336
The
VIC
20
User
Guide
CAN'T CONTINUE
A CONT ·command was issued, but program execution cannot be
resumed because the program has been altered, added to,
or
cleared in
immediate mode,
or
because execution was stopped by an error. Pro-
gram execution cannot be continued past an error message.
Correct the error. The most prudent course
is
to type RUN and
start over. However, you can attempt to reenter the program at the
point
of
interruption by a directed GOTO.
DEVICE NOT PRESENT
No device
on
the bus was present to handshake
an
attention sequence.
The status variable (ST) will have a value of2, indicating a timeout. This
message may occur for any
110 command.
If
the device identification
is
in error, correct the 0
PEN
(or other)
statement.
If
the statement
is
correct, especially if it has worked before,
check the addressed device for malfunction, misconnection,
or
power
off.
DIVISION
BY
ZERO
An attempt was made
to
perform a division operation with a divisor
of
zero. Dividing by zero
is
not allowed.
Check the values
of
variables
(or
constants) in the indicated line
number. Change the program so that the divisor can never be evaluated
to zero,
or
add a check for zero before performing the division.
FILE ALREADY EXISTS
The name
of
the source file being copied with the
COpy
statement
already exists on the destination diskette.
FILE NOT FOUND
The filename given in the LOAD
or
OPEN
statement was not found
on
the specified device.
Check
that
you have the correct tape
or
diskette in the device.
Check the filenames on the tape
or
diskette for a possible spelling error
in the program statement.
FILE NOT
OPEN
An attempt was made to access a file that was not opened via the OPEN
statement.
Open the file.
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