How To Fix PK321 - Several IDocs transferred to processing program simultaneously

PK321 - Overview

• Message type: E = Error

• Message class: PK - Production - KANBAN

• Message number: 321

• Message text: Several IDocs transferred to processing program simultaneously

What causes this issue?

Several IDocs were transferred simultaneously to the processing
program. However, only one IDoc can be posted.

System Response

IDoc inbound processing has been terminated.

How to fix this error?

Make sure that IDocs are transferred indiviually.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PK321 - Several IDocs transferred to processing program simultaneously ?

  The SAP error message PK321 indicates that multiple IDocs (Intermediate Documents) have been transferred to a processing program simultaneously. This can occur in scenarios where the system is set up to process IDocs in parallel, but the processing program is not designed to handle concurrent processing of multiple IDocs.
  
  Cause:
  
  Concurrent Processing: The primary cause of this error is that the IDoc processing program is being invoked for multiple IDocs at the same time, which it cannot handle.
  
  Configuration Issues: The configuration of the IDoc processing might not be set up to allow for parallel processing, or the program itself may not be designed to handle multiple instances.
  Locking Mechanisms: The program may have locking mechanisms that prevent it from processing multiple IDocs simultaneously, leading to this error when multiple IDocs are sent for processing.
  
  
  Solution:
  
  Single Processing: Modify the configuration or the way the IDocs are processed to ensure that only one IDoc is processed