SAP Message BT859 - Init. group & not possible as another group & is already init.

Diagnosis
The system tried to initialize the environment for processing parallelRFCs using the function code SPBT_INITIALIZE. Here it was establishedthat the environment was already initialized for other PBT groups.
This is a programming error in an application program that usesparallel RFCs. You can find the name of the program in the ABAP callstack.
System_response what_to_do
Report this error to the person responsible for the applicationprogram.

727709MESSAGE_TYPE_X short dump in SPBT_INITIALIZE in RFC scenario