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Message type: E = Error
Message class: VV - Requirements and availability
Message number: 501
Message text: Blocking error
A system error occured during the attempt to block the material you are
processing.
It can be assumed that problems exist in the system at the moment,
which prevent proper processing. The whole transaction is therefore
stopped.
Please inform your system administrator as soon as possible.
Error message extract from SAP system. Copyright SAP SE.
VV501
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