April,
I was assuming you were building multiple files to be FTP’d (like num files).
If you are not then you might need to shut down the OB thread that is creating the files as Jim Cobane indicated in order for the IB thread of the second set of threads to not receive an error.
Jim Kosloskey
email: jim.kosloskey@jim-kosloskey.com 29+ years Cloverleaf, 59 years IT - old fart.