Error 10011 returned Data is being used by another user, script or transaction

[greenfields]

I am running a pretty simple applescript which counts the items in a folder that it is passed from a filemaker record, then returns the value to a cell.

the script is

tell application "FileMaker Pro Advanced"

set mybox to cell "path" of current record

end tell

tell application "Finder"

activate

set numberfiles to count of (files in folder mybox whose name extension is "emlx")

end tell

tell application "FileMaker Pro Advanced"

activate

set cell "number" of current record to numberfiles

end tell

This works when I run it with script editor but returns error 10011 (Data is being used by another user, script or transaction) When i run it as a "perform applescript" command in filemaker script.

Any ideas?!?! it's driving me mad!!

[greenfields]

Sorry! solved it. I needed to "commit record" before applescript step!