How To Fix TFC0090 - Task lists already exist; conversion not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: TFC0 - Messages in FC

• Message number: 090

• Message text: Task lists already exist; conversion not possible

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 TFC0090 - Task lists already exist; conversion not possible ?

  The SAP error message TFC0090, which states "Task lists already exist; conversion not possible," typically occurs during the process of converting task lists in the SAP system. This error indicates that there are existing task lists that prevent the conversion process from proceeding.
  Cause:
  The primary cause of this error is that the system has detected existing task lists for the same object or configuration that you are trying to convert. This can happen in various scenarios, such as:
  
  Existing Task Lists: There are already task lists defined for the same material, production version, or routing.
  Inconsistent Data: The data in the system may be inconsistent, leading to conflicts during the conversion process.
  Incorrect Configuration: The configuration settings may not allow for the conversion due to existing dependencies or relationships.
  
  Solution:
  To resolve the TFC0090 error, you can follow these steps:
  
  
  Check Existing Task Lists:
  
  Use transaction codes like CA03 (Display Routing) or C223 (Display Task List) to check for existing task lists related to the object you are trying to convert.
  Identify any task lists that may be causing the conflict.
  
  
  
  Delete or Modify Existing Task Lists:
  
  If the existing task lists are no longer needed, you can delete them using transaction CA02 (Change Routing) or C220 (Change Task List).
  If the task lists are still required, consider modifying them to accommodate the new conversion.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to task list conversion to ensure you are following the correct procedures.
  
  
  
  Check for Dependencies:
  
  Ensure that there are no dependencies or relationships that are preventing the conversion. This may involve checking related materials, production versions, or other configurations.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue, consider reaching out to SAP support for further assistance. They may provide specific notes or patches that address the issue.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CA03, CA02, C223, and C220 for managing task lists and routings.
  SAP Notes: Search for SAP Notes related to TFC0090 for any specific fixes or recommendations provided by SAP.
  System Configuration: Review your system configuration settings to ensure they align with best practices for task list management.
  
  By following these steps, you should be able to identify the cause of the TFC0090 error and implement a solution to resolve it.