★Cannot start two instances of ZW3D, prompt: "Cannot start another copy of ZW3D."

Issue:

In ZW3D, clicking on "Start Another ZW3D" fails to launch another instance of ZW3D and displays an error message: cannot start ZW3D another copy in the output window.

Causes:

It may be due to insufficient permissions.

Solution:

To resolve the issue, right-click on the ZW3D icon, and select Run as administrator to run the program with administrative privileges.