Warnings and Error Messages

By default, warnings and error messages are printed on terminal output. They may be suppressed using -Q option or redirected to a file (together with standard terminal output) using -g option. There are several types of error messages each one with different exit code

• option error message (exit code 5),
• manipulation error message (exit code 10),
• memory allocation error message (exit code 15),
• file manipulation error message (exit code 20),
• input data error message (exit code 25), and
• output data error message (exit code 30).

Each error contains except its type also more or less specific explanation of the error. The place where the error was generated can be identified by the line number, function name, and module name. In the case of input/output data error, the line number and the input/output file name is also provided.