Error UNC paths are not supported Launching ModelSim - 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. Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 10.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']