[MRTCAL\]MCOPY IndexFile Copy the current index (from memory) to the given file (to disk). Any pre-existing file is overwritten. This command is useful for two main purposes: - extract a subset from an index file, by combining the commands INDEX OPEN, MFIND (with criteria), and MCOPY, or - merge several index files, by combining INDEX OPEN, INDEX APPEND (repeated), MFIND, MCOPY.