Interpreting Error Messages
    

Minitab has an internal program called a macro processor that handles all the work that is specific to macros. The macro processor monitors which macro file you are currently using and what macros are in the file, and it processes all macro statements.

Error messages can be sent from the macro processor to the Minitab program. When the macro processor encounters a Minitab command, the processor checks the command briefly and then gives the command to the Minitab program to fully check and execute. Knowing where a message came from can help you troubleshoot:

** ERROR (two asterisks) means an error was found by the macro processor

* ERROR (one asterisk) means an error was found by regular Minitab