CCS: Project resource path variables

Tool/software: Code Composer Studio

Hello,

Under CCS Project Properties --> Resource -> Linker Resources, path variables tab.

I am trying to add a new path variable which is based on another path variable but i am only able to do so if the variable i am basing on is one of the predefined variables by CCS.

If i try to add a new variable which is based (relative) to another one that i have manually added it does not work and CCS complains about no being able to resolve he path.

Is there a way to resolve this?

Thanks

Guy