## ALP Programming Guide and Reference

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### The ALP Messages File

Nearly every message displayed by ALP at run time is stored in a separate message file. The exception to this rule are messages that are displayed if the message file cannot be opened: ALP ends if one of these messages is displayed.

When ALP starts, it determines the name of the message file by creating a name of the form <BaseEXE>.msg (see BaseEXE). Once ALP knows the name of the message file, ALP searches the following directories in the following order for the file:

1.Current directory
2.The directory contained in the BasePATH internal variable
3.Each of the directories specified in the BaseEXE internal variable
4.Each of the directories specified in the PATH environment variable
5.Each of the directories specified in the DPATH environment variable