No concurrent manager is defined to process this request when performing a inventory transaction

Hello,

We are getting this error below in the form when trying to perform a inventory transaction(inter-organization transfer) in Oracle 12.1.3:

"Transaction processor error  No concurrent manager is defined to process this request,so it cannot be processed
Contact your system administrator to define a concurrent manager to process this request or to verify that existing concurrent managers have the correct specialization rules"

This transaction calls the INV:Remote Procedure Manager and we have two of them on two separate nodes  node13 and node14(we have RAC structure).Both are up and running.

The issue comes up when the user tries to process a group of records say 5 but if he just transacts one record the transcation goes though fine.