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WEC iMX6 BSP Release

 

The following table contains known issues, scheduled bug fixes, and feature improvements for the iMX Windows CE BSPs and images.

Any schedules are not guaranteed, but reflect the current planning. The planning could be shifted due to priority changes.
Issues which are scheduled for a specific version will be integrated in the mentioned version of the BSP.

We will update this table continuously in order to always provide the latest state of our development plan.

Odd beta versions, as 1.0b1 or 1.3b3, are internal releases only for testing. They are omitted from the table.

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Issue #StatusSubjectModuleSubsystemWinCE OS

V1.2beta1
Internal version only
WC-586Feature RequestAdd support for new Apalis iMX6D 1GB IT (0035xxxx)Apalis iMX6, Colibri iMX6WEC7, WEC2013

Description: Support the new Apalis iMX6D 1GB IT SKU, product number 0035xxxx.

Not Planned
WC-944Feature RequestGenerate a Toradex Easy Installer image for eMMC-based modulesColibri iMX6FlashWEC7, WEC2013

Description: Currently Windows Embedded Compact is not officially supported on this module.

WC-666Known IssueCeGetVolumeInfo does not report flag CE_VOLUME_TRANSACTION_SAFE for FAT32Apalis iMX6, Colibri iMX6WinCE FeatureWEC7, WEC2013

Description: Function CeGetVolumeInfo does not report flag CE_VOLUME_TRANSACTION_SAFE for FAT32 formated disk. This is an issue in the Microsoft part.

WC-638Feature RequestDrag and Drop of files doesn't work on WEC2013Apalis iMX6, Colibri iMX6WinCE FeatureWEC2013

Description: Drag and Drop of files doesn't work in the explorer/desktop on WEC2013.

WC-637Feature RequestJumbo frames are not support on i.MX6 EthernetApalis iMX6, Colibri iMX6EthernetWEC7, WEC2013

Description: The Ethernet driver only uses standard Ethernet packets of around 1.5KB, bigger frames are currently not supported in the driver. The hardware would limit the frame size to 8kb.

WC-623Feature RequestSupport SD UHS mode (new feature of Colibri iMX6 V1.1)Colibri iMX6SDIO/SD/MMCWEC7, WEC2013

Description: Add support for SD UHS (1.8V) which is possible with V1.1 of the Colibri iMX6.

WC-611Known IssueUpdate source files can't be stored on \FlashDiskApalis iMX6, Colibri iMX6WEC7, WEC2013

Description: The update tool may need to lock the eMMC device during some kind of updates (SPL, bootloader, configblock, registry, splash screen), this may generate an issue if the source file used to read the new image is stored on the eMMC (under \FlashDisk in the Windows CE filesystem).

Workaround: Copy the update file to a different folder (root if it can fit in available RAM) or keep it on removable media during the update.

WC-608Known IssueSystem time does not behave correctly when DST is not activatedApalis iMX6, Colibri iMX6RTCWEC7, WEC2013

Description: When DST is not active the current date/time reported by the system is not precise and lags few minutes per hours during runtime.

Workaround: If you have issues with DST not running correctly go into registry under HKLM\Time Zones and select your timezone. There is a subkey "Dynamic DST" with entries for each year. To fix it create a new entry for year when you have issues and copy value from previous year.

WC-606Known IssueAborting USB transfers may prevent USB pipes from doing further transfer to the deviceApalis iMX6, Colibri iMX6USBWEC7, WEC2013

Description: If multiple transfers are aborted in a short time on a multi-core device further transfer to the same endpoint are not executed by the host controller.

Workaround: Invoking a reset of the pipe is required to re-enable transfers after an abort.

WC-594Feature RequestImplement backlight driverApalis iMX6, Colibri iMX6WEC7, WEC2013

Description: Backlight driver is not currently supported, display driver turns the backlight on when started.

Workaround: Control backlight from the application using the PWM libraries.

WC-570Known IssueI2c: Frequency 16% Too LowApalis iMX6, Colibri iMX6I2CWEC7, WEC2013

Description: With current clock settings the frequencies generated for I2C bus at 100KHz and 400KHz are up to 16% lower than the standard ones, this is due to limited range of dividers available and should not impact operations of connected devices.

WC-553Known IssueXAML OpenGL renderer causes graphical glitches during animationsApalis iMX6, Colibri iMX6GraphicsWEC7, WEC2013

Description: The XAML OpenGL renderer seems to have some problems. Sometimes there are some graphical glitches during animations. This is a problem in the Microsoft XAML to OpenGL layer.

Workaround: The issues can usually be fixed with workarounds in the application, e.g. not using certain controls or borders which create problems.

WC-549Known IssueSome modules don't boot reliably because of eMMC configurationsApalis iMX6, Colibri iMX6BootloaderWEC7, WEC2013

Description: A low percentage of modules don't boot reliably because of the bootrom not handling the eMMC correctly. This leads to non booting modules. Using reset solves the problem, a power-cycle mostly works too.

Workaround: Using different i.MX6 fusing options and eMMC configurations solves the problem. All Apalis and Colibri iMX6 modules which are in Volume Production state already have the right fusing and configurations. For older modules you may apply this fix this by first migrating your module to Embedded Linux, then proceeding as described in the following article on our developer website after which you may migrate back to WinCE/WEC again: http://developer.toradex.com/software-resources/arm-family/linux/linux-booting#eMMC_Fast_Boot_Mode_ApalisColibri_iMX6

WC-535Feature RequestCopy/Paste and Drag and Drop of files doesn't work on WEC2013Apalis iMX6, Colibri iMX6WinCE FeatureWEC2013

Description: Copy/Paste and Drag and Drop of files doesn't work in the explorer/desktop on WEC2013.

Workaround: Use command line to copy files.

WC-530Feature RequestCursor blinks while running OpenGL demo applicationApalis iMX6, Colibri iMX6GraphicsWEC7, WEC2013

Description: Cursor blinks while running OpenGL demo application

Workaround: Application can hide the mouse cursor, especially when using full-screen.

WC-529Feature RequestSupport more modes than just 24-bit on parallel LCD interace on Apalis iMX6Apalis iMX6RGBWEC7, WEC2013

Description: Only 24-bit mode support is implemented on Apalis iMX6.

WC-525Known IssueEffective I2C baud rate is 10-15% less than configuredApalis iMX6, Colibri iMX6I2CWEC7, WEC2013

Description: When a baud rate is configured using the driver IOCTL interface or using Toradex library the clock frequency is 10-15% lower than the frequency that has been configured.

WC-515Feature RequestSupport hardware watchdog in OALApalis iMX6, Colibri iMX6WatchdogWEC7, WEC2013

Description: The i.MX6 processor has a hardware watchdog that can be used to reset the device if something wrong happens in the OS. Currently the BSP is not supporting it. Supporting it (enabling via a bootloader parameter) could increase system reliability and can reset the device in scenarios where the software-based watchdog supported by Windows CE can't (interrupt storm, failure in ISR, infinite busy loop in a high priority thread). This would be transparent for application developers (they will just need to enable it in bootloader parms).

WC-513Known IssueSmall memory leak when using console (WEC2013)Apalis iMX6, Colibri iMX6WinCE FeatureWEC2013

Description: When using a console under WEC2013 there seem to be a memory leak somewhere.

WC-496Feature RequestSupport for audio over HDMIApalis iMX6, Colibri iMX6Digital AudioWEC7, WEC2013

Description: Support audio playback over HDMI.

Workaround: Currently only analog audio is supported.

WC-493Known IssueSetting "none" as irq trigger for a pin returns an errorColibri iMX6WEC7, WEC2013

Description: When using GPIO library setting "none" as value for the irqtrig parameters an invalid parameter error is returned. It's not possible to disable an interrupt in this way.

Workaround: Don't set trigger to "none", but keep interrupt disabled if you don't want it to be generated.

WC-475Known IssueRendering of openGL surfaces in memory does not workApalis iMX6, Colibri iMX6GraphicsWEC7, WEC2013

Description: Open GL surfaces can't be rendered in memory surfaces. It works for screen surfaces.

WC-470Known IssueUSB devices may not work correctly after a software resetColibri iMX6USBWEC7, WEC2013

Description: When the device is reset using the update tool "cold boot" option or invoking one of the windows CE APIs that can generate a reboot (SetSystemPowerState or KernelIoControl) USB devices may not behave correctly and need to be unplugged and plugged back again to be correctly detected. This does not happen after a hardware reset.

WC-468Known IssueOnly 1792MB used on 2GB modulesApalis iMX6GraphicsWEC7, WEC2013

Description: Currently the 2GB module uses 1792MB of memory. The limitation is due to an issue in the GPU driver that prevents it from using physical addresses above 2GB. Parts of the driver are available in binary form only, we are in contact with the original vendor in order to get this fixed.

Workaround: There is no workaround at the moment.

WC-466Known IssueTCP DHCP settings "Lease Expires" date is wrongApalis iMX6, Colibri iMX6EthernetWEC7

Description: The "Lease Expires" date is always set to 1/1/1970 initially. This seems to be WEC7 related issue. This is not an issue on CE6.

Workaround: Do a ip renew (ipconfig /release, ipconfig /renew) to get a correct "Lease Expires" date. If you build your own Image, you can also use a legacy dhcp.dll. Get a dhcp.dll which was build with an MS update level before November 2014, there this was not an issue.

WC-464Feature RequestImprove overall boot timeApalis iMX6, Colibri iMX6Bootloader

Description: The boot time is not optimized yet. We need to improve this.

WC-423Known IssueSlow console on iMX6Apalis iMX6, Colibri iMX6KernelWEC7, WEC2013

Description: Applications that use the Windows CE console to output text may run slower on version 1.4 compared to version 1.3.

WC-420Known IssueAllow changing the USB OTG cable detect pinApalis iMX6, Colibri iMX6USBWEC7, WEC2013

Description: The BSP uses SO-DIMM 137 on Colibri and MXM3 135 on Apalis (this is a dedicated pin), it supports configuration for polarity (only on Colibri) but doesn't allow changing the pin to any other pin.

WC-413Known IssueIRDA can't receive pulses that are shorter than 1/8th of bit lengthApalis iMX6, Colibri iMX6IrDAWEC7, WEC2013

Description: Currently the IRDA interface expects standard IRDA signals that use for zeroes a pulse that is 3/16 of one bit length. IRDA devices may operate with shorter pulses (down to 1.41us) but this is not currently handled by the driver.

WC-411Known IssueCalling SetSystemPowerState to put device in suspend mode crashes the OSApalis iMX6, Colibri iMX6Power ManagementWEC7, WEC2013

Description: Suspend isn't supported in our WinCE BSPs for iMX6. Therefore this API should anyway not be called.

WC-393Known IssueAudio: Buffer underruns in MixerApalis iMX6, Colibri iMX6Analog Audio

Description: Unwanted silent periods when playing audio files.

WC-392Known IssueDowngrading bootloader from version 1.3 to version 1.2 may lead to non-bootable systemApalis iMX6, Colibri iMX6BootloaderWEC7, WEC2013

Description: Some config block settings (splash screen) have been changed in version 1.3 and this may lead to an early crash of 1.2 when restored on a module where 1.3 bootloader settings have been saved.

Workaround: Clear splash screen settings using: clear ss command before downgrading bootloader 1.3 to 1.2 https://developer.toradex.com/knowledge-base/clear-splash-screen

WC-377Known IssueBackup and restore from Update Tool - .Net ProblemColibri iMX6WEC7

Description: Update Tool Backup and Restore problems when .NET CF is installed.

WC-375Known IssueMemory Leak When Connecting ActiveSync/WMDCApalis iMX6, Colibri iMX6WinCE FeatureWEC7

Description: Minor memory leak when repeatedly connecting / disconnecting the USB cable between module and a PC.

Workaround: -

WC-368Feature RequestTurn off display controller when the system is idleDVI, LVDS, RGB, VGACE6, WEC7, WEC2013

Description: To save power when the system is not used, not only the backlight should be turned off, but the display controller should be halted, too.

WC-365Known Issue24 BPP graphics is not supportedApalis iMX6, Colibri iMX6GraphicsWEC7, WEC2013

Description: 24bpp color depth is not supported because it has low performances compared to 16 and 32bpp configurations.

Workaround: Use 32bp, or 16bpp.

WC-364Known IssuePlaySound(null) blocks for two secondsApalis iMX6, Colibri iMX6Analog AudioWEC7, WEC2013

Description: The function to abort a playing sound returns only after about two seconds.

WC-363Known IssueBITBLT SlowApalis iMX6, Colibri iMX6WEC7

Description: Improve BITBLT performance.

WC-359Known IssueSome open GL application don't work on 1.4 releaseApalis iMX6, Colibri iMX6GraphicsWEC7, WEC2013

Description: Some openGL applications seem to have issues running on 1.4 release, issue is still under investigation.

Workaround: Customers building their image from the binary BSP could revert to previous implementation by replacing the following files: k_libGAL.dll libCLC.dll libEGL.dll libGAL.dll libGALCore.dll libGLESv1_CL.dll libGLESv1_CM.dll libGLESv2.dll libGLES_CL.dll libGLES_CM.dll libGLSLC.dll libOpenCL.dll libOpenVG.dll libVDK.dll

WC-356Known Issue.NET CF V3.9 bug when comparing to (constant) 0LApalis iMX6, Colibri iMX6WinCE FeatureWEC2013

Description: Comparing 0L and 0L in .NET Compact Framework 3.9 leads to wrong result.

Workaround: You can find a workaround from Microsoft here https://social.msdn.microsoft.com/Forums/en-US/a187a5da-d46f-440c-9e40-e201636c042d/bug-in-net-cf-justintimecompiler-with-roslyn-generated-ilcode-windows-embedded-compact-2013?forum=netfxcompact

WC-354Feature RequestAdd a setting to force temperature-related shutdownApalis iMX6, Colibri iMX6Power ManagementWEC7, WEC2013

Description: Add an option to DVFS management to shut down the device if the measured temperature exceeds a certain threshold.

WC-341Known IssueFont installation to \Flashdisk\System\Fonts does not workApalis iMX6, Colibri iMX6WinCE FeatureWEC7, WEC2013

Description: New fonts are not seen when they are just copied to the folder \Flashdisk\System\Fonts\

Workaround: Copy the fonts to \Flashdisk\Autocopy\Windows\Fonts\ instead.

WC-333Known IssueImproved boot process (asynchronous driver loading) in bsp 1.4 can cause problems with some driversApalis iMX6, Colibri iMX6KernelWEC7, WEC2013

Description: Due to asynchronous driver loading feature added in BSP/image 1.4 some non-standard drivers might have problems due to resources not being ready at the right time.

Workaround: Disable asynchronous driver loading: https://developer.toradex.com/knowledge-base/busenum2#disabling-asynchronous-driver-loading In this article there are also more information about the topic and more sophisticated workarounds using named events to control the loading process.

WC-330Known IssueSystem tick and performance timer may drift from RTCApalis iMX6, Colibri iMX6RTCWEC7, WEC2013

Description: System tick (1ms) and performance timer are driven by the same clocks that generate CPU clock. RTC is driven by a different quartz to allow it to be powered even when the rest of the SOC is powered off. This may lead to a small difference between the two clocks over time.

WC-316Known IssueUser Credentials for WPA2 Enterprise WiFi connections are not persisted across rebootsApalis iMX6, Colibri iMX6Wi-FiWEC7, WEC2013

Description: Issue was identified as problem with Microsoft code. As WEC7 and WEC2013 are in extended support ( https://support.microsoft.com/en-us/lifecycle/search?alpha=Windows%20Embedded%20Compact%202013 ) this is not going to be fixed by Microsoft updates.

WC-307Known IssueOnly English(United States) region can be usedApalis iMX6, Colibri iMX6WinCE FeatureWEC7, WEC2013

Description: After adding additional locals through the Toradex .cab installer, still only the regional settings English(United States) can be used. Any other region setting prevents the system from booting correctly.

WC-304Feature RequestHardware Accelerated Video DecodingApalis iMX6, Colibri iMX6Video CodecsWEC7, WEC2013

Description: Hardware video decoding isn't implemented for iMX6 WinCE platforms.

Workaround: Use software decoding. Optimize the videos to the right resolution and quality to get best results with playback.

WC-295Known IssueSetting USB device as "USBSER_class" does not workApalis iMX6, Colibri iMX6WEC7, WEC2013

Description: Using USB Client as USBSER_class does not work with all the applications.

WC-292Known IssueDesktop icons reappear after reboot even if relevant registry entries are editedApalis iMX6, Colibri iMX6WEC7, WEC2013

Description: Desktop icons reappear after reboot even if relevant registry entries are edited.[HKEY_LOCAL_MACHINE\Explorer\Desktop] registry entries are not persistent.

Workaround: Disable Explorer:http://developer.toradex.com/knowledge-base/disable-and-enable-the-explorer. Delay screen initialization for smooth transition Splashscreen->Application: [HKEY_LOCAL_MACHINE\Drivers\Display\Colibri] "FirstRefreshDelay"=dword:100 ; Delay of 1st refresh in ms.

WC-284Known IssueUSB Mass Storage Class takes long to mount/does not mountApalis iMX6, Colibri iMX6WEC7, WEC2013

Description: USB Mass Storage Class may take up to few minutes to mount. It may also fail to mount

WC-283Feature RequestAdd an option to the restorefactoryinfo command to retrieve data from barcodeApalis iMX6, Colibri iMX6BootloaderWEC7, WEC2013

Description: Add an option to the restorefactoryinfo command to retrieve data from barcode which makes it easier to configure a module with the right serial number and product ID in the config block.

WC-261Known IssueSystem does not release all memory after process terminatedApalis iMX6, Colibri iMX6WEC7

Description: About 4KB of memory isn't freed after a process is terminated.

WC-260Known IssueIperf test hangs for ublox wifi driver(SDIO8787)Apalis iMX6, Colibri iMX6WEC7, WEC2013

Description: Iperf test hangs for ublox wifi driver(SDIO8787)

Workaround: Set below registry [HKEY_LOCAL_MACHINE\Drivers\Builtin\SDBusDriver] "ThreadPriority"=dword:64 [HKEY_LOCAL_MACHINE\Drivers\BuiltIn\USDHC1] "DisableDMA"=dword:1 "SDIOPriority"=dword:61

WC-256Known IssueBaud rate of bootloader and serial debug output may be using an imprecise baud rateApalis iMX6, Colibri iMX6BootloaderWEC7, WEC2013

Description: The configuration for baud rate in bootloader is not using all the available clocking options, so the baud rate may be 1-2% different from the expected one. This is usually not an issue when connecting to PCs.

WC-236Feature RequestSupport disabling cursor via ExtEscapeApalis iMX6, Colibri iMX6GraphicsWEC7, WEC2013

Description: Allow disabling the cursor at runtime using ExtEscape functions.

Workaround: Permanently disabling the cursor in the registry is supported. Disabling the cursor for single applications also works with the default OS API (ShowCursor())

WC-219Known IssueOpening binary image with Visual Studio shows empty registryApalis iMX6WEC7, WEC2013

Description: This is a side effect of the changes made to speed-up boot done in version 1.4b2 and newer. The base registry is still stored inside the image, but in a different way, in this way the OS will not load and then discard it when an updated registry is stored in flash.

Workaround: If you need to check registry contents for your image you may use registry editor (on a running image) on check reginit.ini in the flat release directory (immediately after build).

WC-217Known IssueMissing partition table leads to non-booting modules after second bootColibri iMX6FlashWEC7

Description: A missing or corrupt partition table will lead to non booting modules after the second boot because the OS image gets overwritten by the file system.

Workaround: Create a correct partition table using either the Toradex Easy Installer which does it automatically, or the preparefs command in eboot.

WC-213Known IssueThreads with higher priority (<101) can freeze the deviceApalis iMX6, Colibri iMX6WinCE FeatureWEC7, WEC2013

Description: If you are running a a thraed with high priority (above 101) this can freeze the device. The device will not be able to handle any other interrupt.

Workaround: Prevent forcing high priority threads to core 1. Do not use high priority threads (above prio 101) whenever possible.

WC-212Known IssueUSB Device not Recognized (Further Issues)Colibri iMX6USBWEC7, WEC2013

Description: Long AttachDelays might be required to assure that all USB devices are recognized.

WC-210Known IssueSPECTRE and MELTDOWN Security Vulnerability Mitigations for i.MX 6 Based ModulesApalis iMX6, Colibri iMX6WEC7, WEC2013

Description: Integrate solutions provided by NXP to mitigate SPECTRE and MELTDOWN security vulnerabilities

WC-203Known IssueUSB-on-the-go driver slows down bootApalis iMX6, Colibri iMX6USBWEC7, WEC2013

Description: Currently, initialization of this driver may take 1 to 1.5 seconds, disabling it if you don't use the OTG port will reduce boot time.

WC-199Known IssueNetwork performances degraded and connectivity unreliable at forced 100MBit/s full duplexApalis iMX6EthernetWEC7, WEC2013

Description: This is a generally known issue: https://en.wikipedia.org/wiki/Duplex_mismatch and applies to any ETH connection.

WC-183Known Issue"Start Debugger Client" Does Not Start in WEC2013Apalis iMX6, Colibri iMX6WinCE FeatureWEC7, WEC2013

Description: "Start Debugger Client" Does Not Start in WEC2013

Workaround: Open a WinCe command line, type the two commands: start conmanclient3.exe cmaccept3.exe

WC-182Feature RequestChange PMIC voltage dynamicallyApalis iMX6, Colibri iMX6Power ManagementWEC7, WEC2013

Description: Changing voltages dynamically could help reduce power consumption.

WC-181Known IssueDisplay clock is not stopped when back-light is turned off so HDMI or VGA might continue to display contentApalis iMX6, Colibri iMX6VGAWEC7, WEC2013

Description: Display clock is not stopped when back-light is turned off so HDMI or VGA might continue to display content. However, displays using the back-light signal to turn off, e.g. normal LCD displays turn off.

Backlog
WC-604Feature RequestImplement splash screen converter tool for iMX6Apalis iMX6, Colibri iMX6GraphicsWEC7, WEC2013

Description: The splash screen converter tool does not exist yet for the i.mx6.

WC-498Feature RequestComplete features of update tool and update libApalis iMX6, Colibri iMX6WEC7, WEC2013

Description: Currently update tool supports: - restore image (compressed or bin file) - restore bootloader - save and restore config block - clearing registry - save and restore registry The tool currently does not support operations on filesystem and does not allow backup/restore of multiple regions at the same time.

Workaround: In combination with the Toradex Easy Installer the AutoCopy feature can be used to store data on the FlashDisk after flashing the bootloader, image, etc.

WC-465Known IssueDisplay signals stop working after some time on customer's boardColibri iMX6GraphicsWEC7, WEC2013

Description: Customer experiencing the issue with version 1.1B2 were no longer having the problem when running 1.1B4.

WC-438Feature RequestSupport suspend/resumeApalis iMX6, Colibri iMX6KernelWEC7, WEC2013

Description: Implement Suspend and Resume feature.

WC-395Known IssueEasy installer Windows CE image does not boot after erase flashApalis iMX6, Colibri iMX6GraphicsWEC7, WEC2013

Description: This happens only on IMAX6Q 1GB IT version (PN: 0035) and it's due to a mistake in the configuration files.

Workaround: Flashing 2.7 linux and then Windows CE fixes the issue.

WC-383Known IssueWEC2013: Audio Files and Sound Scheme MissingApalis iMX6, Colibri iMX6WEC2013

Description: System sounds are not available under WEC2013.

WC-367Known IssueMAC address shown wrong in bootloader mac.cidColibri iMX6BootloaderCE6, WEC7, WEC2013

Description: MAC address configuration shows wrong value in bootloader

WC-366Known IssueUse latest UpdateTool to allow flashing large splash screensApalis iMX6, Colibri iMX6Toradex Feature, Update SystemWEC7, WEC2013

Description: Large splash screen cannot be programmed with the UpdateTool

WC-355Known IssueWriting user data into the config block makes later config block reads invalidApalis iMX6, Colibri iMX6ConfigBlockWEC7, WEC2013

Description: After writing user data to the ConfigBlock, ConfigBlock read operations return invalid values for some parameters eg Bootloader Version, Hardware version.

Workaround: After writing data to Config block, reboot the module before reading other parameters.

WC-352Known IssueEboot: EDID is always taken into accountApalis iMX6, Colibri iMX6BootloaderWEC7, WEC2013

Description: EDID reading cannot be disabled for HDMI displays

WC-351Known IssueEboot does not fully reflect pin configurationsApalis iMX6, Colibri iMX6Bootloader, GPIOWEC7, WEC2013

Description: In Eboot, the gpio settings are not always shown correctly.

WC-339Known IssueRegistry settings for audio codec are not documentedApalis iMX6, Colibri iMX6Analog AudioCE6, WEC7, WEC2013

Description: Changing audio codec registers by registry is supported, but not documented

Workaround: Use the settings as they are documented for PXA and T20/T30 modules.