How To Fix KOSA306 - Production process cannot be reselected

SAP Error Message - Details

• Message type: E = Error

• Message class: KOSA - Product Cost Collector

• Message number: 306

• Message text: Production process cannot be reselected

What causes this issue?

You have changed the characteristic values of the order. The order is
linked to a <DS:GLOS.3559911290FA5063E10000009B38F984>production
process</> through these characteristic values. The order is in turn
linked to a <DS:GLOS.3526B6F2AFAB52B9E10000009B38F974>product cost
collector</> through this production process.
You want the system to find a product cost collector that corresponds
to these (changed) characteristic values.

System Response

The system does not allow the product cost collector to be changed for
the following reasons:
Costs from the order have already been posted to the product cost
collector (based on the previous characteristic values).
No product cost collector that corresponds to the (new) characteristic
values can be found.

How to fix this error?

The costs for this order are still posted to the original product cost
collector.

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 KOSA306 - Production process cannot be reselected ?

  The SAP error message KOSA306, which states "Production process cannot be reselected," typically occurs in the context of production planning and control within the SAP system. This error indicates that the system is unable to reselect a production process for a particular production order or process order due to certain constraints or conditions.
  Causes of KOSA306
  
  
  Production Process Lock: The production process may be locked due to ongoing operations or other transactions that are currently using it.
  
  
  Incompatible Parameters: The parameters set for the production process may not be compatible with the current order or the material being processed.
  
  
  Missing Master Data: Required master data (like routing, work center, or production version) may be missing or incorrectly configured.
  
  
  Status of the Order: The production order may be in a status that does not allow for re-selection of the production process (e.g., if it is already released or completed).
  
  
  Capacity Constraints: There may be capacity constraints in the work center that prevent the re-selection of the production process.
  
  
  Solutions to KOSA306
  
  
  Check Production Process Status: Verify if the production process is currently in use or locked. If it is, you may need to wait until it is free or unlock it if appropriate.
  
  
  Review Order Parameters: Ensure that the parameters for the production order match those required for the production process. This includes checking the material, quantity, and any other relevant details.
  
  
  Validate Master Data: Check the master data related to the production process, including routing, work centers, and production versions. Ensure that all necessary data is correctly maintained.
  
  
  Change Order Status: If the order is in a status that does not allow for re-selection, consider changing its status if it is appropriate to do so.
  
  
  Capacity Planning: Review the capacity planning for the work center. If there are capacity issues, you may need to adjust the scheduling or capacity settings.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance related to your version of SAP and the context in which the error occurs.
  
  
  Related Information
  
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CO01 (Create Production Order), CO02 (Change Production Order), and CO03 (Display Production Order) to manage production orders effectively.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  
  
  User Roles and Authorizations: Ensure that the user has the necessary authorizations to perform actions related to production processes.
  
  
  System Logs: Review system logs for additional error messages or warnings that may provide more context about the issue.
  
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a technical consultant who can provide more in-depth analysis and assistance.