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Chapter
6
ERROR MESSAGES
Whenever the computer cannot understand what it was told to do, it will print an error
message on the screen and wait for you to do something about
it.
The advantage of having
this immediate response to error conditions is that you can use the screen editing function
to quickly fix the problem when it occurs. In many cases the problem
will
be obvious to
you. For example, when a disk error occurs the red error light between the two disk drives
will
light up. Typing PRINT DS$ followed by RETURN
will
cause the error message to be
printed on the screen. Refer to Table 4, User's Quick Reference-Error Messages, to inter-
pret its meaning.
When an error occurs, the computer
will
stop any program that is running, print an error
message or light the error light on the disk drive, put the cursor on the screen, and wait for
the error to be fixed. The error messages which are covered here are those which commonly
occur when learning to LOAD and RUN a program, or SAVE it on disk or tape.
Errors encountered while trying to LOAD a program-
• DEVICE NOT PRESENT
• LOAD and
STATUS ERRORS
• READ ERROR
*
• FILE NOT FOUND
*
• DOS MISMATCH
• DISK ID MISMATCH
*
• DRIVE NOT READY
Errors encountered while trying to RUN a program-
• SYNTAX ERROR
• INPUT ERROR
• REDO FROM START
• DRIVE NOT READY
Errors encountred while trying to SAVE a program-
• VERIFY ERROR
• FILE EXISTS
*
• WRITE PROTECT ON
*
• DRIVE NOT READY
*Disk Errors
47
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