launchProcess?

I keep calling the launchProcess method of the API, and always get a 200 – "process has been queued" response. However, I find no evidence that the SH script actually ran (moves some files around). When I SSH into the server as "ems" and manually call the script, all works fine. But queuing it from the launchProcess does not seem to work. How would you recommend I debug this? Thanks!