"the command finished with a no-zero result" and fails

When running the following script in FIleMaker Pro 9 I get a filemaker error stating that "the command finished with a no-zero result" and fails. Running the script in applescript editor it is successful.

The result shown in applescript editor is a null string "".

tell application "FileMaker Pro"

set calling to cell "ID" of current record

set called to cell "tele" of current record

end tell

set dStr to "dial," & calling & "," & called

do shell script "echo " & dStr & " | nc -u -w 1 192.168.1.10 21900"

Edited December 10, 200718 yr by Guest