System lock error: Inform system administrator
Message type: E = Error
Message class: M8 - Invoice Verification/Valuation
Message number: 128
Message text: System lock error: Inform system administrator
What causes this issue?
A system error has occurred during blocking.
System Response
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
How to fix this error?
Please inform your system administrator.
Error message extract from SAP system. Copyright SAP SE.