User`s guide

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READ ERROR (byte decoding error)
The data or header has been read into disk memory, but a hardware error has been
created by an invalid bit pattern in the data byte. May indicate grounding problem
s.
WRITE ERROR (write-verify error)
The controller has detected a mismatch between the data written to diskette and the
same data in disk memory. May mean the diskette is faulty.
If so, try another. U se
only high quality diskettes from reputable makers.
WRITE PROTECT
ON
The controller has been requested to write a data block while the write prote ct
sensor is covered. Usually caused by writing to a diskette whose write protect notch
is
~overed over with tape to prevent changing the diskette's contents.
READ ERROR (checksum error in header)
The controller detected an error
in the header bytes of the requested data block. The
block was not read into disk memory. May indicate grounding problems.
Usually
unrecoverable.
WRITE
ERROR (.long data block) . .
The controller attempts to detect the sync mark
of the next header after wntmg a
data block. If the sync mark does not appear on time, this error message
is
generated. It is caused by a bad diskette format (the data extends into the ne xt
block) or by a hardware failure .
DISK ID MISMATCH
The disk controller has been requested to access a diskette which has not be en
initialized. Can also occur if a diskette has a bad header.
SYNTAX ERROR (general syntax) .
The
DOS cannot interpret the command sent to the command channel. Typicall y,
this is caused by an jllegal number of file names, or an illegal pattern. Check your
typing and
try again. ·
SYNTAX ERROR (invalid command)
The DOS does not recognize the command. It must begin with the first character
sent. Check your typing and try again.
SYNTAX ERROR (invalid command)
The command sent is longer than 58 characters. Use abbreviated disk command s.
SYNTAX ERROR (invalid file name)
Pattern matching characters cannot be used in the
Save command or when Opening
files for the purpose
of Writing new data. Spell out the file name.
SYNTAX ERROR (no file given)
The file name was left out of a command or the DOS does not recognize it as such.
Typically, a colon (:) has been omitted. Try again.
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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.
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.
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.
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 unavoidably too large for the diskette, either
split it into two files on two diskettes, or use abbreviations in the data to
allow shorter records.
WRITE FILE OPEN
A write file that has not been closed is being re-opened for reading. This file must
~ immediately rescued, as described in Housekeeping Hint #2 in Chapter 4, or it
will become a splat (improperly closed) file and probably be lost.
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 .
FILE
NOT FOUND
The requested file does not exist on the indicated drive. Check your spelling and try
again.
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.
FILE
TYPE MISMATCH
The requested file access
is not possible using files of the type named. Reread the
chapter covering that file type.
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 zero (0), all remaining sectors are
full .
If the diskette is not full yet, try a lower track and sector.
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