How To Fix ACM331 - Parameter &1 of entity &2 has unknown/invalid type: '&3'

SAP Error Message - Details

• Message type: E = Error

• Message class: ACM - Message-Class for all ACM functions/exceptions

• Message number: 331

• Message text: Parameter &1 of entity &2 has unknown/invalid type: '&3'

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 ACM331 - Parameter &1 of entity &2 has unknown/invalid type: '&3' ?

  The SAP error message ACM331 indicates that there is an issue with a parameter in a specific entity where the type of the parameter is either unknown or invalid. This error typically arises in the context of configuration or data processing within the SAP system, particularly in the area of Application Configuration Management (ACM).
  
  Cause:
  
  Invalid Parameter Type: The parameter specified in the error message is not recognized by the system, which could be due to a typo, incorrect configuration, or an unsupported data type.
  Missing or Incorrect Configuration: The entity might not be properly configured, or the parameter might not be defined in the system.
  Version Mismatch: If there are updates or changes in the system, the parameter type might have changed, leading to incompatibility.
  Custom Development Issues: If there are custom developments or enhancements, they might not align with the expected parameter types.
  
  
  Solution:
  
  Check Parameter Definition: Verify the definition of the parameter in the