You can achieve this 'copy' functionality with a combination of the standard K2.net SPS document events.

First use a 'get latest version' event to store the document in a temporary holding area (either a process datafield or on the file system somewhere). Then use a document upload event to copy the document from this temporary holding area to the new library.

You should preferably clean up the temporary holding area afterward, and you may also want to delete the original document afterward.

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