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The best way to import from NMIS8 to NMIS9 is to create a CSV file and then copy it to NMIS9 Administration GUI ==> Add node
https://community.opmantek.com/display/opCommon/Importing+Nodes+with+Admin+GUI
sudo ./import_nodes.pl csv=/usr/local/nmis9/admin/node.csv verbose=1 simulate=f
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