LrTasks.execute not getting correct return code

Question

Hi all,
I'm writing an Export Filter Provider that, in the postProcessRenderedPhotos function, calls an external Python script like this:
            exitStatus = LrTasks.execute(command)
            log:debug("Task returned, exit status is " .. exitStatus)
            if exitStatus ~= 0 then
At the end of my Python script, I use
sys.exit(0)
and have verified that running of the script indeed returns 0 by running it in the shell and then checking the return code
echo $?
returns 0
Whenever I run this script from my Export Plugin, I always get an exitStatus of 256.  Any ideas on what I'm doing wrong?  Thanks!

Answer 1

I would first assure that in the Lightroom case as well, the script is executing up to the sys.exit statement as well - I suspect it is not (but don't really know...).
I have called python scripts from plugins both successfully and unsuccessfully, although I can't be certain I've checked the actual return code from the sys.exit command.
Consider trying an ultra-short script which writes to a file and exists with a code - make sure you can read the file in your plugin before assessing the return code.
If still a problem, report as bug on Adobe feedback site of course:
http://feedback.photoshop.com/photoshop_family/topics/new
Rob