[AmigaOS / ApolloOS Command Reference\Why] 
 

WHY

Format: WHY Template: (none) Purpose: To print an error message that explains why the previous command failed. Path: Internal Specification: Usually when a command fails the screen displays a brief message. This message typically includes the name of the file (if that was the problem) but does not go into detail. For example, the message "Can't open <filename>" may appear. This could happen for a number of reasons - AmigaDOS may not be able to locate the file, the file is of the wrong type, or there was insufficient disk space or RAM for the operation requested. If the reason is not immediately obvious, enter WHY to get a more complete explanation.