The command line is:
dfconv profile-fname [input-fname] [output-fname] [-d]
The input and output file-names are optional as they can be extracted from the profile file. If you specify file-names on the command line as well as in the profile file, those on the command line take precedence.
After conversion, the operating system error level is set to non-zero if an error occurred during conversion. If you are running the conversion from a batch file, you can interrogate this to determine what action to take after the conversion.