How To Fix UD336 - Cardinality C (& not allowed here)

SAP Error Message - Details

• Message type: E = Error

• Message class: UD - EDM - Enterprise Data Model

• Message number: 336

• Message text: Cardinality C (& not allowed here)

What causes this issue?

You selected "C" as the left side of the cardinality for a hierarchical
relationship. This is incorrect because there has to be a referenced
entity for each dependent entity in hierarchical relationships.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

First check the type and cardinality of the relationships again and
make the necessary changes.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UD336 - Cardinality C (& not allowed here) ?

  The SAP error message UD336, which states "Cardinality C (& not allowed here)," typically occurs in the context of SAP Business Workflow or when dealing with data modeling in SAP systems. This error indicates that there is a cardinality issue in the data model or workflow definition, specifically related to the use of a cardinality constraint that is not permitted in the given context.
  Cause:
  
  Cardinality Constraints: The error arises when a cardinality constraint (like "C" for "Conditional") is applied in a situation where it is not allowed. For example, if you are trying to define a relationship between entities or objects in a way that does not conform to the expected cardinality rules.
  Modeling Errors: It can also occur due to incorrect modeling in the workflow or data structure, where the relationships between objects are not properly defined.
  Incompatible Object Types: The error may also be triggered if you are trying to use a conditional relationship between incompatible object types.
  
  Solution:
  
  Review Cardinality Definitions: Check the cardinality definitions in your data model or workflow. Ensure that the relationships between entities are defined correctly according to the rules of cardinality.
  Adjust Workflow or Data Model: Modify the workflow or data model to ensure that the cardinality constraints are appropriate for the context. For example, if you have defined a relationship as "C" (conditional), consider whether it should be "1" (one) or "0..1" (zero or one) instead.
  Consult Documentation: Refer to SAP documentation or guidelines regarding cardinality and relationships in workflows or data models to ensure compliance with best practices.
  Testing: After making adjustments, test the workflow or data model to ensure that the error is resolved and that the system behaves as expected.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific fixes or updates related to this error message. SAP frequently releases notes that address known issues and provide solutions.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered similar issues. They can provide insights or solutions based on their experiences.
  Training and Documentation: Consider additional training or resources on SAP workflow and data modeling to better understand cardinality and its implications in your specific context.
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.