How To Fix ACM_SYNTAX201 - Paths/Filters are not allowed as optional elements (only fields+assocs.)

SAP Error Message - Details

• Message type: E = Error

• Message class: ACM_SYNTAX - ACM: DCL Syntax Error Messages

• Message number: 201

• Message text: Paths/Filters are not allowed as optional elements (only fields+assocs.)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ACM_SYNTAX201 - Paths/Filters are not allowed as optional elements (only fields+assocs.) ?

  The SAP error message ACM_SYNTAX201 indicates that there is an issue with the definition of a path or filter in your data model or query. Specifically, it states that paths and filters cannot be defined as optional elements; only fields and associations are allowed to be optional.
  Cause:
  This error typically arises in the context of SAP applications that utilize the ABAP Core Data Services (CDS) or similar data modeling frameworks. The root causes can include:
  
  Incorrect Data Model Definition: You may have defined a path or filter in a way that makes it optional, which is not permitted.
  Misconfiguration in Query: If you are using a query that includes paths or filters, they may have been incorrectly set up to be optional.
  Incompatibility with Framework Rules: The framework you are using may have specific rules that restrict certain elements from being optional.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Data Model: Check the definition of your data model, particularly the paths and filters. Ensure that they are not marked as optional. Only fields and associations should be defined as optional.
  
  
  Modify the Query: If you are working with a query, ensure that any paths or filters are defined correctly. Remove any optional settings from paths or filters.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific version you are using to understand the rules regarding optional elements in paths and filters.
  
  
  Testing: After making the necessary changes, test the data model or query again to ensure that the error has been resolved.
  
  
  Related Information:
  
  SAP Notes and Knowledge Base Articles: Check for any relevant SAP Notes or KBA that might provide additional context or solutions for this error.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  SAP Help Portal: Utilize the SAP Help Portal for detailed documentation on data modeling and query definitions.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.