How To Fix PMMO_BASIS022 - Parallel processing dispatcher could not be instantiated: No valid server

SAP Error Message - Details

• Message type: E = Error

• Message class: PMMO_BASIS - Messages for PMMO Basis Objects

• Message number: 022

• Message text: Parallel processing dispatcher could not be instantiated: No valid server

What causes this issue?

The system is trying to instantiate the class <AB>CL_SSI_DISPATCHER</>.
The instantiation failed because no valid server is available for
parallel dispatching (exception <AB>CX_SSI_NO_SERVER</>).

System Response

The system will either continue in single-threaded mode or abort the
operation.

How to fix this error?

Execute the process again.

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 PMMO_BASIS022 - Parallel processing dispatcher could not be instantiated: No valid server ?

  The SAP error message PMMO_BASIS022 indicates that the parallel processing dispatcher could not be instantiated because there is no valid server available. This error typically occurs in the context of parallel processing in SAP, where the system attempts to distribute tasks across multiple servers or instances for efficiency.
  Causes:
  
  Server Configuration Issues: The SAP system may not have any valid application servers configured for parallel processing.
  Network Issues: There may be network connectivity problems preventing the dispatcher from accessing the required servers.
  System Load: If all available servers are busy or overloaded, the dispatcher may not be able to find a valid server to handle the request.
  Authorization Issues: The user or process may not have the necessary authorizations to access the servers.
  System Parameters: Incorrect or missing configuration parameters in the SAP system related to parallel processing.
  
  Solutions:
  
  
  Check Server Configuration:
  
  Go to transaction SM51 to check the list of application servers. Ensure that there are valid servers available and that they are up and running.
  Verify the configuration in transaction RZ10 to ensure that the parameters related to parallel processing are correctly set.
  
  
  
  Network Connectivity:
  
  Ensure that there are no network issues preventing communication between the dispatcher and the application servers.
  Check firewall settings and network configurations.
  
  
  
  Monitor System Load:
  
  Use transaction SM66 to monitor the load on the application servers. If they are busy, consider optimizing the workload or adding more resources.
  
  
  
  Review Authorizations:
  
  Ensure that the user or process attempting to initiate parallel processing has the necessary authorizations to access the servers.
  
  
  
  Check System Parameters:
  
  Review the relevant parameters in the instance profile (transaction RZ10) to ensure they are set correctly for parallel processing. Look for parameters like rdisp/pp/enable and rdisp/pp/num_servers.
  
  
  
  Restart Services:
  
  If the issue persists, consider restarting the affected application servers or the entire SAP system to refresh the connections and configurations.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to parallel processing and the specific error message for any patches or updates that may address the issue.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  Documentation: Refer to the official SAP documentation for detailed information on configuring and troubleshooting parallel processing.
  
  If the problem continues after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.