Said the Gramophone - image by Neale McDavitt-van Fleet

: For SOLIDWORKS, Error 6 can sometimes relate to a mismatch in Visual Basic for Application (VBA 7.1)

If a previous license is blocking the current one, manual registry intervention may be required. Press Win + R , type , and run as administrator.

In short, Error 6 means: “I received unexpected data (or no data) when I expected a valid numeric or command response.”