As you stated there is no support for converting QVWs using Section Access with the Converter Tool.
Are you and your colleague running the same version of Sense? Otherwise that would explain why the behaviour differs, since in later versions the precense of Section Access is detected while converting the qvw file.
By removing Section Access from the qvw and reloading the data, it should be possible to convert.
If you still are having problems you can try to save the qvw without data as explained here: