Update Custom Properties - How do I use it?

I have tried to use Update Custom Properties, but cannot get it to work.

I add a task and it runs, but fails.

It seems that the information I enter into the Update Custom Properties window erases itself and becomes empty???

I tried it with a folder first (silly me), then tried it with one file.

SW opens, if it is not open, then shuts down and the TS says it has failed.

What am I doing wrong?!?

I edited the Task Title, Please add description to one file.

I Added File, .375X.625-SPACER.SLDPRT. [Is it the full stops? Does TS not recognize that as a valid filename? i will try another file.]

I changed the start time to a future time.

NEXT

I selected Description, Text, and added a Value of \$PRP:"SW-Configuration Name".

FINISH

I waited for it to run. It ran. FAIL.

SolidworksTask Scheduler