PROCFILES_FILENAME macro not updated

[Kim]

Hi,
I'm using "Process files" to list all dll's in a folder. Results should be available in the system macros: PROCFILES_*

PROCFILES_COUNT is updated correctly
PROCFILES_FILE_DIR is updated correctly
PROCFILES_ROOT_DIR is updated correctly

PROCFILES_FILENAME is always empty..............

I have tried to pause/step the build process, and PROCFILES_FILENAME is always empty. Are there any alternatives that can be used?