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

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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