How To Fix MCEX147 - Reading of RFC queue &1 with destination &2 already started

MCEX147 - Overview

• Message type: E = Error

• Message class: MCEX - Extraction Interface LIS/BW

• Message number: 147

• Message text: Reading of RFC queue &1 with destination &2 already started

What causes this issue?

You have started processing of extraction queue &V1&. However, it seems
that processing of the queue is still running.

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

How to fix this error?

If you have received this message but are sure that processing of queue
&V1& is not currently active, check whether lock entries still exist
for the lock object EMCEXUPD, and delete them as required.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MCEX147 - Reading of RFC queue &1 with destination &2 already started ?

  The SAP error message MCEX147 indicates that there is an issue with the Remote Function Call (RFC) queue. Specifically, it means that a reading process for the RFC queue with a specific destination has already been initiated, and a second attempt to read from the same queue is being made, which is not allowed.
  
  Cause:
  
  Concurrent Access: The error typically occurs when multiple processes or jobs attempt to read from the same RFC queue simultaneously. This can happen if there are multiple instances of a program or transaction trying to access the same destination.
  Long-Running Processes: If a previous reading process is taking longer than expected, it may block subsequent attempts to read from the queue.
  
  Configuration Issues: There may be configuration issues in the RFC destination settings or in the way the RFC queues are managed.
  
  
  Solution:
  
  Check Running Processes: Use transaction SM58 (Transactional RFC) to check for any long-running or stuck RFC calls. If