I tried to report the issue from my FM Pro from the Help menu, but could not find the bug report page. So I post here to see if this is a real bug or sth I did wrong (or mis-understood the script set)...
I remote accessed a file in FM server 11 from FM 11 advanced (both in Window environment) and run a script at a given layout. The script has a step of "Insert File(reference, field name, path) to attach a file into a container field, which is on the given layout.
I found: if I checked the option "Prohibit modification of value during data entry" of the container field, the above script step would generate an error (code: 3); if the option of the container field was not checked, the script step would run through without error.