Commodore PET - Operating System Error Messages

Error Message
UNDEFD FUNCTION
Cause and Suggested Remedies
Reference was made to a user defined func-
tion
that has not previously been defined by
appearing in a
DEF FN statement. The defini-
tion must precede the
fu nction reference.
Define the function. Place
DEF FN state-
ments near the beginning of the program.
OPERATING SYSTEM ERROR MESSAGES
BAD DATA
DEVICE NOT PRESENT
FILE NOT FOUND
FILE NOT OPEN
FILE OPEN
366
String data was input when numeric data
was expected.
Correct the
input data to numeric, or
change the program to accept string input.
No device
on the IEEE 488 Bus was present
to handshake an attention sequence. The
Status function
will have a value of 2. indicat-
ing a timeout. This message may occur for any
1/0 commando
If the device identification
is in error. correct
the
OPEN (or other) statement. If the state-
ment
is correct. especiallY if it has worked
before. check the addressed device for mal-
function, misconnection, or power off.
The filename given in the LOAD or
OPEN
statement was not found on the tape (or other
specified devicel.
Check that vou have the correct tape in the
cassette. Check the filenames
on the tape (or
other medium) for possible spelling error in
the program statement.
An attempt was made to access a file that
was not opened via the OPEN statement.
Open the file.
An
attempt was made to open a file that has
already been opened via a previous OPEN
statement.
Check logical file numbers (first parameter
in the
OPEN statement) to be sure a different
number
is used for each file. Insert a CLOSE
statement if vou want to reopen the same file
for a different 1/0 operation.