How To Fix /PM0/ABT_MESSAGES021 - Invalid parent key of parameter '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/ABT_MESSAGES -

• Message number: 021

• Message text: Invalid parent key of parameter '&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 /PM0/ABT_MESSAGES021 - Invalid parent key of parameter '&1' ?

  The SAP error message /PM0/ABT_MESSAGES021 Invalid parent key of parameter '&1' typically indicates that there is an issue with the configuration or data integrity related to a parameter in the SAP system. This error is often encountered in the context of SAP PM (Plant Maintenance) or related modules where parameters and their hierarchical relationships are defined.
  Cause:
  
  Invalid Configuration: The parent key for the specified parameter does not exist or is incorrectly defined in the system.
  Data Integrity Issues: There may be inconsistencies in the data, such as missing entries in the database that are expected to be present.
  Transport Issues: If the configuration was transported from one system to another (e.g., from development to production), there may have been issues during the transport process that led to missing or incomplete data.
  Custom Development: If there are custom developments or enhancements, they may not be handling the parameters correctly.
  
  Solution:
  
  Check Parameter Configuration: Verify the configuration of the parameter in question. Ensure that the parent key is correctly defined and exists in the system.
  Data Consistency Check: Run consistency checks on the relevant tables to ensure that all necessary entries are present and correctly linked.
  Review Transport Logs: If the issue arose after a transport, review the transport logs to identify any errors or warnings that may indicate what went wrong.
  Debugging: If you have access to the ABAP development environment, you can debug the program or transaction that is generating the error to get more insights into what is causing the issue.
  Consult Documentation: Check SAP notes and documentation related to the specific module you are working with for any known issues or patches that may address this error.
  Contact SAP Support: If the issue persists and you cannot find a resolution, consider reaching out to SAP support for assistance.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may want to check transaction codes related to configuration (e.g., SPRO for configuration settings).
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message.
  Community Forums: Check SAP Community forums or other user groups for similar issues and solutions shared by other users.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.