ID:21673 Can't open file "<file>" for writing

CAUSE: The Quartus Prime software could not open the specified file to write the design summary for the Power and Thermal Calculator. If the file already exists, it might be read-only. The file system might be read-only, or completely full. The specified name might refer to an existing file system directory, or the file name may be invalid for the file system. Under Microsoft Windows operating systems, the file may be locked because it is open in another application instance.

ACTION: If the file exists, remove it or make it writable, and make sure the file system is writable. Check that the file name is valid for the file system. If the file is locked by another application, close the file in the other application. Or specify a different filename to the --output_ptc command-line option to quartus_pow.