Help with a script error message

I have been using a nice third-party script to turn the digitizer tablet on a ModBook off and on. The script to turn the pen function off is:

tell application "Finder"
display dialog "Turn off pen and sleep?"
end tell
tell application "System Events"
set PTD to (unix id of process "PenTabletDriver") as text
do shell script "kill -STOP " & quoted form of (PTD)
end tell

It is compiled and has been running very nicely from the Scripts pull down menu. However, this morning, after I started up the ModBook (running 10.5.8), I got the following AppleScript error:

Can’t make «class idux» of «class prcs» “PenTabletDriver” of application “System Events” into type Unicode text

Can anyone explain what is happening and, more importantly, how I correct it and get back to how this was running two day ago?

Model: Axiotron Modbook
AppleScript: 2.2.1
Browser: Firefox 16.0
Operating System: Mac OS X (10.5)

process “PenTabletDriver” does not exist and the unix id of a non existent process cannot be converted to text :slight_smile:

Reboot, I guess. Or use the script that turns it on.

Thanks - somehow the Pen Tablet Driver had been removed. Re-installing it seems to have solved the problem.

Many thanks again.