Unable to determine the current toolkit. Ensure that ARM_TOOL_VARIANT is set correctly.

I would like to try the basic Position independent code execution on eval version of DS-5 studio. Even for a basic Hello world I was getting the Error "Unable to determine the current toolkit. Ensure...
Unable to determine the current toolkit. Ensure that ARM_TOOL_VARIANT is set correctly.

I would like to try the basic Position independent code execution on eval version of DS-5 studio. Even for a basic Hello world I was getting the Error "Unable to determine the current toolkit. Ensure...
armclang.exe: error: Unable to determine the current toolkit. Check that ARM_TOOL_VARIANT is set correctly.

here i am using cmd prompt for executing How to i resolve this problem.
armclang.exe: error: Unable to determine the current toolkit. Check that ARM_TOOL_VARIANT is set correctly.

here i am using cmd prompt for executing How to i resolve this problem.
How to determine where function was called from

From my code I need to figure out has my function been called from the ISR or just regular application code. I do know that application is running is the User Thread mode and ISR is in privileged handler...