Applies To:
  • CitectSCADA 2.00, 2.01
Summary:
The following Graphic cards have bugs in their drivers that may cause CtDraw or Citect to crash:
 
ATI Mach64 When using the most recent driver for Mach64 SVGA adapter released by ATI (V2.22, 13 March 1996), with Windows 95, Citect may crash with a GPF. Windows 95 notifies that Citect32 (Version 4.x) performed an illegal operation and that it is going to shut down. The following details are displayed: CITECT32 caused a general protection fault in module DIBENG.DLL at 0005:00002bd3.

ATI have provided a solution which appears to work. They suggest that they have experienced the same problem with other graphics software packages. Their solution is to add:

StretchEngine=0 under [Display] in your SYSTEM.INI file.

Note: You will need to restart Windows 95 after modification.
ATI Graphics Ultra Pro This card will cause CtDraw version 2.00 to crash, when you display the Zoom Window. Also, the thumbnail image of the page will be saved incorrectly into the file and when you try to open the file (and so display the thumbnail), CtDraw will crash. CtDraw version 2.01 bypasses the driver to save the thumbnail, so this problem can be worked around. However the zoom may still crash. There may also be some other unknown problems with this card.

You can run this card in 8514/a compatible mode, in this mode it works OK., however it will not support the highest 1280x1024 resolution.

The latest version of the driver for this card will fix all of these problems. This driver is available on the Citect BBS.
TRIDENT If you run this card in 800x600x256 or 1024x768 modes, CtDraw will crash when you display the zoom window. The 800x600x16 colour modes works OK.
Compaq XE The initial release of the CompaQXE Windows Driver has a bug that causes the bitmap editor in CtDraw to crash. This bug is now fixed in the latest version of the Compaq Driver. The driver still has a bug that will not display a trend at runtime correctly (when you try to scroll a trend). Check with your Compaq supplier if a later driver is available.

Citect version 2.10 has a workaround for the scroll trend problem.
Compaq AVGA Early drivers for this card will cause the bitmap editor to crash in CtDraw. Make sure your driver is after 5th October 1992. Drivers before this version will cause problems. The latest drivers are available on the Citect Support BBS.
STEALTH PRO Most operations with bitmaps will fail with this card. Including Zoom, Bitmap Editor as well as Citect runtime. Version 1.1 was tested and this board is not recommended.
Speed Star Pro Speed Star Pro Version 1.05 driver crashes while running Citect.(Seen in Citect v1.xx). It gives the impression that compression is causing some problems. If a standard windows driver, say, VGA or SVGA is installed, the display card seems to work without problems. A new version of the driver is due in May 94.
 

Solution:
If you have any problems with the Graphic Editor or Citect Runtime you should test to see if it is associated with the display driver. Try running at different resolutions (640 x 480 vs 1024 x 768) and colour depths (16 colour vs 256 colour). If the card will emulate an 8514/a card, use that mode with the windows standard 8514/a driver. Finally try running with the standard VGA driver supplied with Windows. You must use the standard VGA driver not just run the same driver at VGA resolution. The Microsoft developed VGA driver is very reliable and if the problem goes away the problem is most likely in the display driver. If this is the case then contact the makers of your graphic adaptor to get the latest display driver.

Citect has been developed using CompaQ Computers running AVGA, QVision and 8514/a display cards. Because of this, we know that these hardware configurations are reliable. All graphic display cards and drivers should be compatible under the Windows environment, however there is always some bugs in the drivers, which may cause applications to crash. You may experience problems with some cards. If you find problems with some particular graphic cards, please report the problem to Citect Support so we can contact the card developers to try to resolve the problem. 
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