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NodeXL Error message: “Invalid License” – What should I do?

This issue can be resolved by copying the original key attached to the delivery email back onto the target system.  On some systems files can be set to be read only by default.  If this happens, NodeXL Pro can then not update (and validate) its license key.

To resolve the issue, find the location of the “.LIC” file we sent to you.  This is the original license key file sent as an attachment to an email.

Save this file to the location of the current license key file (you may have created a folder for this or left it in downloads or the desktop).

When you locate the NodeXL Pro License key file (“licensePro_#.lic”) in the file browser, right-click it and select Properties.

Then uncheck “Read-Only”.  This should then allow NodeXL Pro to read and update the license key.

Further information on installation issues and error messages can be found here.

If you cannot resolve this issue please send an email to and we will help you as soon as possible.

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