Applies to: ZWCAD 2017
Issue:
When I double-click a .dwg drawing to open, firstly it opens normally but then it opens the file again, so it will prompt to tell me that this file is already opened and would I like to open the file read-only.
Reason:
This is due to the registry info is incorrectly for double-clicking .dwg drawings to open. By using FileTypesMan.exe, I can see that the Command-Line is "C:\Program Files\ZWCAD 2017\ZWCAD.exe" "%1". It is set when I click the Browse... button to select the ZWCAD.exe as software to open .dwg drawings. And the other parameters are set as follows.
Solution:
By changing the Command-Line to C:\Program Files\ZWCAD 2017\ZWCAD.exe /DDE, And then click OK. When I double click .dwg drawings to open again, it is normal now.
In some cases, you may encounter crash for this setting if you double click dwg file, please remove /DDE to try.