How To Fix /IWBEP/EPM_COMMON010 - Start Loop for class &1

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/EPM_COMMON -

• Message number: 010

• Message text: Start Loop for class &1

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 /IWBEP/EPM_COMMON010 - Start Loop for class &1 ?

  The SAP error message /IWBEP/EPM_COMMON010 Start Loop for class &1 typically occurs in the context of SAP Gateway and OData services. This error indicates that there is a recursive loop happening in the processing of an OData request, often due to a misconfiguration or an issue in the data model.
  Cause:
  
  
  Recursive Relationships: The error often arises when there are circular references in the data model. For example, if an entity has a relationship to another entity that, in turn, has a relationship back to the first entity, it can create an infinite loop during data retrieval.
  
  
  Incorrect Navigation Properties: If navigation properties are not correctly defined or if they point to the wrong entities, it can lead to loops when the OData service tries to resolve these properties.
  
  
  Data Model Configuration: Issues in the configuration of the data model in the SAP Gateway service can also lead to this error. This includes incorrect associations or cardinalities.
  
  
  Service Implementation: If the service implementation (e.g., in the ABAP code) does not handle certain scenarios correctly, it can lead to loops.
  
  
  Solution:
  
  
  Check Data Model: Review the data model for circular references. Ensure that relationships between entities are correctly defined and that there are no loops in the navigation paths.
  
  
  Review Navigation Properties: Ensure that navigation properties are correctly set up and that they do not point back to the original entity in a way that creates a loop.
  
  
  Debugging: Use the SAP Gateway Client (transaction /IWFND/GW_CLIENT) to test the OData service and identify where the loop occurs. You can also use debugging tools in the ABAP environment to trace the execution and find the source of the loop.
  
  
  Adjust Service Implementation: If the issue is in the service implementation, modify the ABAP code to handle the relationships correctly and prevent infinite loops.
  
  
  Check for Updates: Ensure that your SAP system is up to date with the latest support packages and notes, as there may be fixes for known issues related to this error.
  
  
  Consult SAP Notes: Look for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide guidance on best practices for OData service implementation.
  
  
  Related Information:
  
  SAP Gateway: Understanding how SAP Gateway works and how OData services are structured can help in troubleshooting these types of errors.
  OData Services: Familiarity with OData concepts, such as entities, navigation properties, and associations, is crucial for resolving issues related to data retrieval.
  Debugging Techniques: Learning how to effectively debug OData services in SAP can help identify and resolve issues more efficiently.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance.