Execute Stream Command - Unable to remove files using Wilcards

Hello,

hope someone can point me in the right direction.

I need to delete all files starting with some attributes value, so based on Linux way it should be something like this:

rm -f /opt/my_path/myfile_*

I decided to use Execute Stream Command in this way:

The path seem correct, the command generated, pasted into a Linux shell is working fine, however the processor did not delete the files.

If i try with a specific file it works fine.

Seems that * is not permitted, any clue?

Many Thanks to everybody...