How To Fix FMCA_ISR_EN173 - Application class is unknown for correspondence

SAP Error Message - Details

• Message type: E = Error

• Message class: FMCA_ISR_EN -

• Message number: 173

• Message text: Application class is unknown for correspondence

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message FMCA_ISR_EN173 - Application class is unknown for correspondence ?

  The SAP error message FMCA_ISR_EN173, which states "Application class is unknown for correspondence," typically occurs in the context of the SAP Correspondence Management (CM) module. This error indicates that the system cannot find a valid application class for the correspondence type you are trying to process.
  Cause:
  
  Missing Configuration: The application class for the correspondence type may not be configured in the system.
  Incorrect Customization: There may be incorrect or incomplete customization settings in the Correspondence Management module.
  Data Issues: The correspondence type being used may not be correctly defined or may have been deleted or modified incorrectly.
  Authorization Issues: The user may not have the necessary authorizations to access the application class.
  
  Solution:
  
  
  Check Configuration:
  
  Go to the Correspondence Management configuration settings in SAP.
  Verify that the application class for the specific correspondence type is defined correctly.
  Ensure that the correspondence type is linked to the correct application class.
  
  
  
  Maintain Application Class:
  
  If the application class is missing, you may need to create or maintain it in the system.
  Use transaction code SPRO to access the configuration settings and navigate to the Correspondence Management section.
  
  
  
  Review Correspondence Type:
  
  Check the definition of the correspondence type you are trying to use.
  Ensure that it is active and correctly configured.
  
  
  
  Check Authorizations:
  
  Ensure that the user has the necessary authorizations to access the correspondence type and application class.
  You may need to consult with your SAP security team to verify user roles and permissions.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to Correspondence Management for any specific guidance or known issues.
  
  
  
  Debugging:
  
  If the issue persists, consider debugging the process to identify where the application class is being called and why it is not recognized.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SPRO (for configuration), SOST (for monitoring outgoing correspondence), and others related to Correspondence Management.
  SAP Notes: Check the SAP Support Portal for any notes related to this error message, as there may be patches or updates that address the issue.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  If the problem continues after following these steps, it may be beneficial to reach out to SAP support for further assistance.