[Solved] ARM/developmentstudio-2020.1 Error: Error: C9511E: Unable to determine the current toolkit. Check that ARM_TOOL_VARIANT is set correctly.

ds2020 reports an error after installing the license, the error is as follows

Error: C9511E: Unable to determine the current toolkit. Check that ARM_TOOL_VARIANT is set correctly.
ARM Compiler could not determine the product installation it is part of. You might be able to resolve this by reinstalling the tools, or ensuring that ARM_TOOL_VARIANT and ARM_PRODUCT_PATH are set appropriately.
Information about this error is available at: http://ds.arm.com/support/lic86
General licensing information is available at: http://ds.arm.com/support/licensing/
If you need further help, provide this complete error report to your supplier or [email protected]

Solution:

Modify environment variables
Revise
setenv ARM_TOOL_VARIANT ult
for
setenv ARM_TOOL_VARIANT gold
Test after reload
problem solved

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