How To Fix /PM0/ALH_MESSAGE001 - Error in serializing: Parameter IN_DATA_TYPE has invalid value (&1)

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/ALH_MESSAGE -

• Message number: 001

• Message text: Error in serializing: Parameter IN_DATA_TYPE has invalid value (&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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/ALH_MESSAGE001 - Error in serializing: Parameter IN_DATA_TYPE has invalid value (&1) ?

  The SAP error message /PM0/ALH_MESSAGE001 Error in serializing: Parameter IN_DATA_TYPE has invalid value (&1) typically indicates that there is an issue with the data type being passed to a function or method in the SAP system. This error is often related to the serialization process, where data is being converted into a format suitable for transmission or storage.
  Cause:
  
  Invalid Data Type: The parameter IN_DATA_TYPE is expected to have a specific value, but it is receiving an invalid or unexpected value. This could be due to a programming error, incorrect configuration, or data corruption.
  Mismatch in Data Structure: If the data structure being serialized does not match the expected format or type, this error can occur.
  Custom Code Issues: If there are custom developments or enhancements in the system, they might be passing incorrect values to the serialization function.
  
  Solution:
  
  Check Input Values: Review the values being passed to the function or method that is generating this error. Ensure that the IN_DATA_TYPE parameter is being set correctly according to the expected values.
  Debugging: Use the SAP debugger to trace the execution of the program and identify where the invalid value is being set. This can help pinpoint the source of the issue.
  Review Custom Code: If there are any custom developments, review the code to ensure that it adheres to the expected data types and structures.
  Consult Documentation: Check the SAP documentation for the specific function or method being called to understand the expected input parameters and their valid values.
  SAP Notes: Search for relevant SAP Notes or Knowledge Base Articles (KBAs) that might address this specific error. SAP frequently updates its knowledge base with solutions to common issues.
  Testing: If changes are made, conduct thorough testing to ensure that the issue is resolved and that no new issues are introduced.
  
  Related Information:
  
  SAP Version: Ensure that you are aware of the specific version of SAP you are using, as error messages and their resolutions can vary between versions.
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in troubleshooting, such as SE80 (Object Navigator) or SE37 (Function Module).
  Community Forums: Consider checking SAP Community forums or other online resources where similar issues may have been discussed.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.