PRINTERR Print Full Text Error Messages printerr This command replaces the basic OS-9 error printing routine (F$Perr service request) which only prints error code numbers, with a routine the reads and displays textual error messages from the file /d0/SYS/errmsg. Printerr's effect is system-wide. A standard error message file is supplied with OS-9. This file can be edited or replaced by the system manager. The file is a normal text file with variable length line. Each error message line begins with the error number code (in ASCII characters), a delimiter, and the error message text. The error messages need not be in any particular order. Delimiters are spaces or any character numerically lower then $20. Any line having a delimiter as its first character is considered a continuation of the previous line(s) which permits multi-line error messages. Once the printerr command has been used, it can not be undone. Once installed, the printerr module should not be unlinked. Printerr uses the current user's stack for an I/O buffer, so users are encouraged to reserve reasonably large stacks. For more information see: , . OS9: printerr