June 21, 1990


Dear Customer,

Here are the addenda to the User's Guide and Scanner Installation Guide:


Windows 3.0 on IBM PS/2 Machines

In order for Windows 3.0 to run reliably on IBM PS/2 machines, you must modify
the HIMEM.SYS line in your CONFIG.SYS file.  If HIMEM.SYS is in the root 
directory of your C: drive, the line should read:

	DEVICE=C:\HIMEM.SYS /M:PS2

This will allow your IBM PS/2 to run Windows 3.0 reliably.


Verifier Input Limitations

The maximum input line length in the Verifier is 339 characters including 
spaces and region breaks.  If you have a problem with input line length, try
zoning and recognizing the page in question column by column.


"Out of Memory" Errors

WordScan will run very reliably in a true 2 Mb machine.  If you are running
on a network, have allocated extra environment space, or have TSR programs
like Sidekick running on your machine, WordScan ends up with less than 2 Mb
to work with.  For many pages WordScan may still run fine.  For very difficult
pages, WordScan may run out of memory and produce this message.  If you are
getting this message on just regular pages, make sure that you aren't using
up a lot of memory for other purposes.  If you have a 386 machine, you can
solve this problem simply by running Windows in enhanced mode.


"Out of Disk Space" Errors

WordScan needs enough free disk space to work properly.  Make sure you have
enough free disk space to save files, etc.  If you have less than 500K bytes
free on your hard disk, WordScan may not be able to operate properly.


File Overwrite Protection

Potentially hundreds of files can be created by saving a large document.
Because of this, checking to see whether any of these files could potentially
overwrite a portion of a previously saved document would take too much time.
Instead, we have adopted a far faster method that may warn you of an overwrite
situation when no danger of overwrite exists.  For example, it will warn you
if you try to save the document "foo" and have a previously saved document
named "foob."


Page Size Limitations

The maximum page size for WordScan is 4096 by 4096 pixels.  On regular pages
at regular resolutions you will never run into this limitation.  At 400 dpi
(dots per inch), the page is limited to 8.5" by 10.24".  At 600 dpi, the page
is limited to 6.8" on a side.


Recognizing Dithered Images

Although we have tried to protect against this, it is fairly easy for you to
try to recognize text on a page that has been scanned with a dither pattern
set.  Normally dithered images have very poor recognition.


Excel, Lotus, and Quattro (.WK1) Output Limitations

Output to these spreadsheets is limited to 8192 lines, 255 columns,
65546 cells, and 240 characters per cell (essentially characters per line).
Files that exceed these limits will result in the error message "Conversion
document too large for target."


Multimate Output Limitations

Output to Multimate is limited to 128K bytes total file size and 256
pages.  Files that exceed these limits will result in the error message
"Conversion document too large for target."


"Numeric Tabs" Limitations

Selecting "Numeric Tabs" in the Style Sheet will cause WordScan to align
tables of numbers in columns with the decimal point aligned down the column
provided the decimals are aligned on the original document and the numbers
are contained in a table with at least three columns.


Dest 3000 Scanners with Auto Document Feeders

If you lift the cover of a Dest 3000 scanner with an auto document feeder
while a page is feeding, the scanner will lock up.  You will have to turn the
scanner off and then back on again then reboot your system (Ctrl-Alt-Del) to
clear this condition.


Microtek Scanner Addressing on the IBM PS/2

The Microtek scanner for the PS/2 uses the MS-MCY board.  This board uses a
fixed I/O address which may conflict with the mouse without this conflict
showing up when you configure your system with your reference diskette.  The
MS-MCY board has two revisions.  The REV-A board uses I/O addresses 400-40f
hexidecimal.  The REV-B board uses I/O addresses 500-50f hexidecimal.  If a
conflict exists, you can avoid problems by not moving the mouse while the
scanner is scanning.


Early HP ScanJet Scanners with Auto Document Feeders

If you lift the auto document feeder of an early model HP ScanJet scanner
while the document is prefeeding (just as it is going into the feeder), the
scanner may lock up.  You will have to turn the scanner off and then back on
again to clear this condition.


A Final Word

All of us at Calera have taken extreme care to insure the quality of this
product.  If you are reading this file because you are having a problem with
WordScan and you haven't found the solution here, here are a few additional
ideas that may help you solve your problem:

   * Consult the "Troubleshooting" section of the User Guide.
    
   * If WordScan used to work but isn't working now, think carefully about
     the things you changed between the time you know it worked and now.
     Did you install new software or hardware, alter your CONFIG.SYS file,
     or get installed on a network?  Could any of these things have affected
     WordScan?  It wouldn't hurt to reinstall WordScan at this point to make
     sure you haven't accidentaly erased part of it.
    
   * If you are installing WordScan for the first time and you can't get it
     to work, try running the Technical Assistant.  Make sure your scanner
     is working by testing it with the manufacturer's software.  Most
     manufacturers include software with their scanner that you can use to
     test it and see if it's working right.
    
   * If you've run the Technical Assistant, been through the User's Guide (and
     Scanner Installation Guide if it's a scanner problem), been through
     this file, and are at the end of your rope, give us a call.  Our
     technical support number is (408) 986-8746.
   
Happy Recognition!
