Message type: E = Error
Message class:  RU - Messages for order completion confirmation 
Message number: 068
Message text: Sub-operation & is already confirmed by & percent
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The SAP error message RU068 indicates that a sub-operation in a production order has already been confirmed by a certain percentage. This typically occurs in the context of production planning and execution, where operations are broken down into sub-operations for more detailed tracking and management.
Cause: The error message RU068 is triggered when you attempt to confirm a sub-operation that has already been partially or fully confirmed. This can happen due to: Duplicate Confirmation: An attempt to confirm a sub-operation that has already been confirmed by another user or process. Incorrect Sequence: Trying to confirm a sub-operation before the preceding operations have been confirmed. System Configuration: Settings in the production order or routing that do not allow for multiple confirmations of the same sub-operation.
Solution: To resolve the RU068 error, you can take the following steps: Check Confirmation Status: Review the confirmation status of the sub-operation in question. You can do this by navigating to the production order
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