Concurrent Program cannot access directories

I am running a concurrent program that executes a bash script.  The script basically reads from a directory and creates a directory on the server but I keep getting the "Permission Denied" error.  The concurrent program is running as user uat1.  If I manually log into the server as uat1, I can access the directories and create additional directories just fine.  But when I attempt to do that via a concurrent program, I get the permission error.  What could be wrong?