Hmm, difficult problem. FF Core is naturally a multi-threaded application and thus runs multiple jobs at once.
A few thoughts:
1. it is possible to set FF Core to be single threaded and thus only a single job will process at a time. In 6.1 this is in the Core Configure tool. But be aware this will effect ALL jobs. The value to change is maxSimulJobs to 1.
2. Does the 3rd party application run in a fixed amount of time? the Collect component can delay jobs a fixed amount of time.
3. The only other method I can think of would be to build a queueing method in scripts outside of Core. Jobs would need to be added to a temp queue (store files via jobID) another process would make the actual calls to the 3rd party application.
