How To Fix CNV450 - Program &1 cannot be allocated a task number

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 450

• Message text: Program &1 cannot be allocated a task number

What causes this issue?

The system created parallel tasks for the program. You can restart an
individual task only from the process monitor.

System Response

The program is stopped.

How to fix this error?

Start the program for the corresponding task number from the process
monitor.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV450 - Program &1 cannot be allocated a task number ?

  The SAP error message "CNV450 Program &1 cannot be allocated a task number" typically occurs during the execution of a conversion program, particularly in the context of data migration or system conversion processes. This error is associated with the SAP Conversion Tools and can arise due to various reasons.
  Causes:
  
  Program Not Found: The program specified in the error message (&1) may not exist in the system or may not be properly registered.
  Authorization Issues: The user executing the program may not have the necessary authorizations to allocate a task number.
  System Configuration: There may be issues with the configuration of the conversion tools or the system itself.
  Task Number Limitations: The system may have reached its limit for task numbers, or there may be a problem with the task number allocation mechanism.
  Transport Directory Issues: Problems with the transport directory or transport management system can also lead to this error.
  
  Solutions:
  
  Check Program Existence: Verify that the program specified in the error message exists in the system. You can do this by using transaction SE38 or SE80 to search for the program.
  Review Authorizations: Ensure that the user has the necessary authorizations to execute the program and allocate task numbers. You may need to consult with your security team to check the user's roles and authorizations.
  Check System Configuration: Review the configuration settings for the conversion tools and ensure that everything is set up correctly. This may involve checking the relevant customizing settings.
  Clear Task Numbers: If the system has reached its limit for task numbers, you may need to clear some old or unused task numbers. This can be done through transaction SE01 or SE09.
  Transport Directory Check: Ensure that the transport directory is correctly configured and accessible. You may need to check the transport management settings in transaction STMS.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error. SAP frequently releases notes that provide fixes or workarounds for known issues.
  
  Related Information:
  
  SAP Notes: Search for SAP Notes related to the CNV450 error message in the SAP Support Portal. These notes may provide specific guidance or patches.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE38 (ABAP Editor), SE01 (Transport Organizer), and STMS (Transport Management System).
  Documentation: Review the documentation for the SAP Conversion Tools and any related migration guides to ensure that you are following the correct procedures.
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.