How To Fix GW901 - Gateway reader

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 901

• Message text: Gateway reader

What causes this issue?

The gateway reader is the gateway process that is started by the
dispatcher when the computer is booted up.
In the SNA environemnt there are also the gateway work processes.

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 GW901 - Gateway reader ?

  The SAP error message GW901 typically indicates an issue with the SAP Gateway, specifically related to the Gateway reader. This error can occur in various scenarios, often when there are problems with the connection or configuration of the SAP Gateway.
  Cause:
  
  Connection Issues: The error may arise due to network connectivity problems between the SAP Gateway and the backend system.
  Configuration Errors: Incorrect configuration settings in the SAP Gateway or the backend system can lead to this error.
  Authorization Problems: The user may not have the necessary authorizations to access the Gateway services.
  Service Activation: The required OData services may not be activated in the SAP Gateway.
  System Performance: High load on the system or performance issues can also trigger this error.
  
  Solution:
  
  Check Network Connectivity: Ensure that there is proper network connectivity between the SAP Gateway and the backend system. You can use tools like ping or traceroute to diagnose network issues.
  Review Configuration: Verify the configuration settings in the SAP Gateway and ensure they are correctly set up. This includes checking the RFC destinations and ensuring they point to the correct backend system.
  User Authorizations: Check the user authorizations to ensure that the user has the necessary permissions to access the Gateway services. You can do this by reviewing the user roles and authorizations in the SAP system.
  Activate OData Services: If the required OData services are not activated, you can activate them using the transaction code /IWFND/MAINT_SERVICE. Ensure that the services are properly registered and activated.
  Monitor System Performance: Check the system performance and load. If the system is under heavy load, consider optimizing performance or scaling resources.
  Check Logs: Review the SAP Gateway logs for more detailed error messages. You can use transaction codes like SLG1 to check application logs or SM21 for system logs.
  
  Related Information:
  
  SAP Notes: Check for relevant SAP Notes that may provide additional insights or patches related to the GW901 error.
  Documentation: Refer to the official SAP documentation for the Gateway and OData services for more detailed troubleshooting steps.
  Community Forums: Engage with SAP community forums or support channels for additional help and shared experiences from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to contact SAP support for further assistance.