When I try to save as PDF it returns error 3. From FIlemaker Client to Filemaker Server, it is working properly.  

Why are you declaring the $filePath in the first place, when not using it at all, in the following line?

--sd

I use that on the other line which is not shown on the screenshot.

Take a look here: 

https://forum.fmbetterforms.com/t/generate-a-pdf-on-the-server-guide/296

--sd

I already did this but when saving as pdf it returns error code = 3

14 minutes ago, archrid404 said:

I already did this but when saving as pdf it returns error code = 3

What about: Save as PDF needing "Allow Printing" in the Privilege Set

--sd

The user has full access already. This script works on client to PSOS but not working on Data API to PSOS