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Install Error 1939

Summary: How to fix the installation Error 1939.
Related installation help: Troubleshooting Rhino 5 Installation


I get Error 1939 'Invalid command line argument'.


One common cause for this error with the Rhino 5 installer is the use of extra double-quotes (“) when entering user information during the setup.


When you enter your name and other user information, do not type any double quotes, for example typing something like:

Bob “Grumpy” Ross

as a user name would cause this error.

rhino/error1939.txt · Last modified: 2020/08/14 (external edit)