FlexNet licensing error -88 - The system clock has been set back


An Arm tool reports an error containing one or more of the following:

  • Flex error code: -88
  • Flexnet licensing error -88
  • The system clock has been set back.

What causes this error, and how do I solve it?


The following table lists possible causes and resolutions for the issue:



There is a file on the machine that has an invalid timestamp. For example, an access/creation/modification date/time that is in the future.

You will need to correct any timestamps that are invalid. Contact license.support@arm.com if you need additional information on how to resolve this.

The date/time on your client system is incorrect.

Set the date/time correctly. If the problem persists please contact license.support@arm.com.