DELRINA

        895 Don Mills Road                6830 Via Del Oro
         500-2 Park Centre                    Suite 240
         Toronto, Ontario               San Jose, California
          Canada M3C 1W3                  U.S.A. 95119-1353

                       Product Support Numbers
           BBS:(416)441-2752      WinFax PRO 3.0 Only:(416)441-0921
      Fax Back:(416)443-1614       All Other Products:(416)441-1026
                          Fax:(416)441-0774

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                   T E C H N I C A L    N O T E S
                      Product: WinFax PRO 3.0
                         Document No.: 2081
                  Document Date: September 2, 1993
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Subject: "Image Contains Invalid Data"

Situation:
==========
The message "Image Contains Invalid Data" appears when attempting to 
view a particular page of a fax. WinFax and Windows may lock up when 
this occurs.

Solution:
=========
Once an image file is invalid, it cannot be viewed or loaded in the 
WinFax Viewer.

If WinFax locks up:

1.  Press F1 to open WinFax online help.

2.  Close the online help to return to WinFax.

3.  Exit and restart WinFax.

    If you attempt to view the same page, WinFax and Windows will lock 
    up again.

Invalid image files may be caused by any of the following:

    - Screen savers or other memory resident programs that monitor the 
      communication ports for activity.

    - System buffering problems.

    - Using WinFax with an incompatible fax/modem initialization string.

Depending on your situation, try one or more of the following to prevent 
fax images from becoming invalid.

a)  Most screen savers work by monitoring the communication ports for 
    activity, which can disrupt WinFax operations. You must disable IRQ 
    monitoring for your screen saver to avoid these disruptions. To read 
    about other symptoms of screen saver interference and how to disable 
    IRQ monitoring, refer to the following technical note:

        2030 -- Screen Savers, Using with WinFax

b)  In some cases, other TSRs or memory resident programs, such as virus 
    scanning software, may be monitoring the communication ports and 
    disrupting WinFax operations. Disable these programs on a temporary 
    basis to determine if they are causing the problem. For information 
    on memory resident programs, see your DOS user/reference manual.

c)  Edit the SYSTEM.INI file in your Windows directory to alter the system 
    buffering. Add the following settings to the [386Enh] section of the 
    SYSTEM.INI file ...

        Comboosttime=30
        Com1Buffer=1024

    ... where "Com1" is your COM port.

d)  If faxes continue to generate invalid image files, you may be using 
    WinFax with an incorrect fax/modem initialization string. Try the 
    following:

    -  Run the WinFax PRO Setup program to respecify the fax/modem 
       configuration.

       Follow the procedure for Changing Your Modem in the WinFax PRO 
       User's Guide. See the Adding Options After Installation section of 
       Chapter 2.

    -  When prompted to specify your fax/modem description, be sure to 
       select the option for the exact make and model of your fax/modem.
       If your fax/modem does not appear in the description list, select 
       the "generic" setting at the top.

       Refer to your fax/modem manual or contact the manufacturer if you do 
       not know the exact make and model.

    -  If the problem continues, contact Delrina Technical Support for 
       assistance.