How To Fix MPLAN401 - Tests started

SAP Error Message - Details

• Message type: E = Error

• Message class: MPLAN - Messages for Maintenance Plan API

• Message number: 401

• Message text: Tests started

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 MPLAN401 - Tests started ?

  The SAP error message MPLAN401 typically indicates that there are issues related to the planning process in the Material Requirements Planning (MRP) module. The message "Tests started" suggests that the system is performing checks or validations during the planning run, but it may not provide specific details about the underlying issue.
  Possible Causes:
  
  Data Inconsistencies: There may be inconsistencies in the master data, such as material master records, BOMs (Bill of Materials), or routing data.
  Configuration Issues: Incorrect configuration settings in MRP parameters or planning strategies can lead to errors during the planning run.
  Missing Master Data: Required master data for materials, such as MRP views or procurement types, may be missing or incomplete.
  Locking Issues: If another process is locking the data that MRP needs to access, it can lead to errors.
  Resource Availability: If resources (like production capacity) are not available or are incorrectly defined, it can cause planning issues.
  
  Solutions:
  
  Check Master Data: Review the material master records, BOMs, and routing data for completeness and accuracy. Ensure that all necessary views are maintained.
  Review MRP Configuration: Check the MRP configuration settings in the system. Ensure that the planning parameters are set correctly for the materials being planned.
  Run Consistency Checks: Use transaction codes like MD02 or MD03 to run MRP and check for any inconsistencies or errors that may be reported.
  Check for Locks: Use transaction SM12 to check for any locks on the relevant data. If locks are found, investigate the processes holding them.
  Analyze Logs: Review the MRP logs for more detailed error messages or warnings that can provide insights into what went wrong during the planning run.
  Consult SAP Notes: Check the SAP Support Portal for any relevant notes or updates that may address known issues related to MPLAN401.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MD01 (MRP Run), MD02 (Single-item, single-level planning), and MD03 (Single-item, multi-level planning).
  MRP Documentation: Review SAP documentation on MRP processes to understand the configuration and data requirements.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, it may be beneficial to consult with an SAP expert or your organization's SAP support team for further assistance.