You may see this error if you are running the ModelSim-Altera software version 10.0c and later and using mgcld license daemon version 10.8 or older. You must use the current version of the mgcld license daemon with a floating license for the ModelSim-Altera software. The ModelSim-Altera software version 10.0c requires mgcld version 11.6.
Download the mgcld license daemon version 11.6 from the links below:
- Windows: ftp://ftp.altera.com/outgoing/release/mgcld.exe
- Linux: ftp://ftp.altera.com/outgoing/release/mgcld
You may also find the current version of the mgcld license daemon in the Quartus® II installation directory:
Windows: <Quartus II installation path>\modelsim_ae\win32aloem\mgcld.exe
Linux: <Quartus II installation path>/modelsim_ae/linuxaloem/mgcld