Input file with peptide sequences and optionally charge numbers (mutually exclusive to 'in_seq') [txt,opt.]Output file; if empty, output is written to the screen [txt,Inactive]The text sent to standard out during the execution of MassCalculator.The text sent to standard error during the execution of MassCalculator. (If it appears in gray, it's the output of a previously failing run which is preserved for your trouble shooting.)