Error “UNC paths are not supported” Launching ModelSim

Description

If you launch the ModelSim^®-Altera simulation software from a working directory that is mapped via a universal naming convention (UNC) path (a path that starts with // instead of drive letter), you receive the following error message in SOPC Builder: UNC paths are not supported. Defaulting to Windows directory. This error occurs because ModelSim is calling a command shell, which does not support UNC paths.

Resolution

Map the UNC path to a drive letter and use the drive letter to reference the working directory in the launching shell.