39:
SYNTAX ERROR (invalid command)
The DOS does not recognize a command sent
to
the command channel (secondary
address 15). Check your typing and try again.
50:
RECORD NOT PRESENT
The requested record number has not been created yet. This
is
not
an
error in a new
relative
file
or one that is being intentionally expanded. It results from reading past
the last existing record, or positioning to a non-existent record number with the
Record# command.
51: OVERFLOW IN RECORD
The data
to
be written in the current record exceeds the record size. The excess has
been truncated (cut off). Be sure
to
include all special characters (such
as
carriage
returns)
in
calculating record sizes.
52: FILE TOO LARGE
There isn't room left
on
the diskette
to
create the requested relative record.
To
avoid this error, create the last record number that will be needed
as
you first create
the file.
If
the
file
is
too large for the diskette, either split it into two
files
on
two
diskettes, or use abbreviations in the data to allow shorter records.
60:
WRITE FILE OPEN
A write
file
that has not been closed
is
being reopened for reading. This
file
must
be
immediately rescued,
as
described
in
BASIC Hint
#2
in Chapter 2, or it will
become a splat (improperly closed)
file
and probably be lost.
61: FILE NOT OPEN
A
file
is
being accessed that has not been opened by the DOS. In some such cases
no
error message
is
generated. Rather the request
is
simply ignored.
62:
FILE NOT FOUND
The requested
file
does not exist on the indicated drive. Check your spelling and try
again.
63: FILE EXISTS
A file with the same name
as
has been requested for a new
file
already exists
on
the
diskette. Duplicate
file
names are not allowed. Select another name.
64: FILE TYPE MISMATCH
The requested
file
access
is
not possible using
files
of
the type named. Reread the
chapter covering that
file
type.
65:
NO
BLOCK
Occurs in conjunction with B-A. The sector you tried
to
allocate
is
already
allocated. The track and sector numbers returned are the next higher track and
sector available.
If
the track number returned
is
0, all remaining sectors are full.
If
the diskette
is
not full yet, try a lower track and sector.
101
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