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ARMCC: Using USB dongle license with laptop in low power mode

Information in this knowledgebase article applies to:

  • Arm Compiler v5.xx
  • Arm Compiler v6.xx


I have a USB dongle based Flex license for Arm Compiler and using this USB dongle on a laptop.

The license is working correctly when the laptop is connected either with the docking station or the external charger.

However, if the laptop is battery powered the compiler is not able to check out the license and it results in license errors.

Can you please provide some suggestion on this ?


Our suggestion would be to check the settings of the operating system.

During the low power mode, in order to save power, windows automatically shuts down the power to USB ports. It surely saves some power, but it can cause the problems when you are using a USB dongle based license. In case the USB port is powered down the compiler will fail to check out a license and thus it is necessary to change the corresponding power settings in order to avoid the license errors.

Last Reviewed: Thursday, January 11, 2018

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