How To Fix TK201 - Generation flag '&' invalid (allowed values are "X", "0", and " ")

SAP Error Message - Details

• Message type: E = Error

• Message class: TK - Transport Organizer

• Message number: 201

• Message text: Generation flag '&' invalid (allowed values are "X", "0", and " ")

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 TK201 - Generation flag '&' invalid (allowed values are "X", "0", and " ") ?

  The SAP error message TK201 indicates that there is an issue with the generation flag in the context of a task or process that is being executed. The generation flag is expected to have specific values, which are "X", "0", or a blank space (" "). When the system encounters an invalid value (in this case, represented by '&'), it raises this error.
  Cause:
  The error is typically caused by one of the following:
  
  Incorrect Input: The generation flag is being set to an invalid value (anything other than "X", "0", or " ").
  Data Corruption: There may be an issue with the data being processed, leading to unexpected values being passed to the generation flag.
  Custom Code or Enhancements: If there are custom developments or enhancements in the system, they might be incorrectly setting the generation flag.
  
  Solution:
  To resolve the TK201 error, you can take the following steps:
  
  
  Check Input Values: Review the input values being passed to the function or transaction that is generating the error. Ensure that the generation flag is set to one of the allowed values ("X", "0", or " ").
  
  
  Debugging: If you have access to the ABAP debugger, you can set breakpoints in the relevant code to inspect the value of the generation flag at runtime. This can help identify where the invalid value is being introduced.
  
  
  Review Custom Code: If there are any custom programs, user exits, or enhancements that might be affecting the generation flag, review that code to ensure it adheres to the expected values.
  
  
  Data Validation: If the error is related to data being processed (e.g., from a database table), validate the data to ensure it does not contain invalid values for the generation flag.
  
  
  Consult Documentation: Check the SAP documentation or notes related to the specific transaction or function module you are using. There may be additional guidance or known issues related to this error.
  
  
  SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. Provide them with details about the error, including the context in which it occurs.
  
  
  Related Information:
  
  
  Allowed Values:
  
  "X": Typically indicates that a certain feature or option is enabled.
  "0": Usually indicates that a feature or option is disabled.
  " ": A blank space often indicates that no specific setting is applied.
  
  
  
  Transaction Codes: Depending on the context of the error, you may want to check specific transaction codes related to the process you are working with (e.g., transaction codes for configuration, data entry, or reporting).
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address this specific error or provide additional troubleshooting steps.
  
  
  By following these steps, you should be able to identify and resolve the cause of the TK201 error in your SAP system.