Transaction Processor error No concurrent manager is defined to process this request, so it cannot be processed.

ISSUE:

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

SOLUTION:

Please try below solutions it should work.

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

Check below profile option 

Concurrent:TM Transport Type value should be 'QUEUE'. if value is different change value to 'QUEUE'.

System Administrator  -> Profile -> System 

 'Concurrent:TM Transport Type' = QUEUE 

-OR-

 Setup is no configured correctly..
  
 Error was due to the ‘Standard’ Data group attached to Responsibility, from where Transaction Manager is scheduled/Active.

 On Changing its Value to Custom Datagroup ‘EMR Standard’, now Transactions are Processed.
 As per Logic, Data Group attached to Responsibility from where Transaction Managers are scheduled/Active/Run should be same with Data group of Concurrent Manager ‘Receiving Transaction Manager’.

Ref note: 2039758.1