Message type: E = Error
Message class:  CN - Meldungen für Netzpläne 
Message number: 045
Message text: Kein Vorschlagswert für Netzplannummer möglich
You want to copy a network. Since external number assignment has been
activated for networks in Customizing, you could have the network
number be derived fromt the WBS element number in the network header.
However, you have not entered a WBS element in the network header and
therefore the system cannot propose a new network number.
The system does not display a proposal for the network number.
Enter your own network number.
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