I have a string attribute that is created inside TOPs as:

my_path="$HIP/geo/my_geo.$F4.bgeo.sc"

If I reference it in any file output parameter as `@my_path` I get exactly:

$HIP/geo/my_geo.$F4.bgeo.sc

It reads like a pure string I need the variables "$HIP" and "$F4" expand at cook time to have the correct path I've tried to use the hou.expandString() expression but I couldn't make it work, I hope I am making sense.
What I am missing?


Thanks.