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Exploding VFP6.0
Message
De
19/02/1999 11:45:37
 
 
À
19/02/1999 11:35:04
Information générale
Forum:
Visual FoxPro
Catégorie:
Problèmes
Divers
Thread ID:
00188508
Message ID:
00189329
Vues:
32
>>
>>My, you seem desperate.
>>
>Yes, I put in 12 hours yesterday in preparation for a prototype delivery
>which was scheduled for this afternoon. The crash totally corrupted the
>project files and I missed not only the delivery but the check as well.
>
>>
>>I didn't follow the whole thread - a couple of
>>quick questions (We had a problem like this ):
>>(assuming there are no viruses, SP2 is installed etc)
>>
>I've checked for viruses, scanned the disk, defragged it, and installed
>SP2, Gallery Updates, new Active X Updater, new Setup Wizard, and a Y2K
>fix for the new Setup Wizard.
>>
>>1. Does this behaviour occur in other VFP apps?
>>
>This is the only VFP6.0 app I'm working on. I have FP2.0 on another
>machine, and it's very stable.
>>
>>2. Does this crash occur always at the same place?
>>
>I was working in the general area of report design when it crashed
>a few times recently. Sometimes when I would fire up the Report
>Wizard or the Query Wizard I would see the Pretty Blue Screen. The
>big one yesterday came when I created a Query, then directed the
>output to a label. I was filtering on a logical print flag and the
>presence of a date in one field, then putting a few bits onto a
>mailing label.
>>
>>3. Are you releasing objects that are still active in a roundabout
>>way like having an active object on a page in a pageframe and then
>>changing the pagecount to 0 (pulling the rug beneath the table...
>>practically guaranteed to crash a complex system)
>>
>Not that I know of. I'm still trying to put it together. Just
>running forms from the Project Manager window until I can get it
>working well enough to package better.
>>
>>4. Are you using active X controls? If yes are they updated versions?
>>
>Not using any yet, but I have downloaded the Updater because
>it was there.
>>
>>5. What Video Driver are you using?
>>
>The one that came with my machine. I have an SIS 5597 Video Card
>with 2Mb Ram. Under Display Adapters/SIS 5597/Properties/Driver,
>it shows:
>
>Provider: Silicon Information Systems
>Driver File Details:
> c:\windows\system\sis597.drv
> c:\windows\system\sismini.vxd
> c:\windows\system\vmm32.vxd (vdd.vxd)
>
>If I have to revert to a plain VGA driver will I be restricted to
>a 640x480 resolution? Will my client be forced into the same
>hammer-and-chisel environment? Are these problems going to be
>part of my work product as well? Will Visual Fox Pro harm my
>client?
>

Bob, I've not tried this, and know very little about the SiS video chipset, but you might be able to use the generic SuperVGA driver that ships with Win9x, which will allow at least 800x600 at 256 colors if the cards works with the driver at all.

The issue of video drivers is a significant one with VFP, lots of things, including screen and report anomalies, can be traced to the video driver (the same is true of the printer driver; both interact with the GDI (Graphic Device Interface) and can create problems.)

>These are some of the issues I'm considering regarding this tool.


VFP is not the only tool that gets bitten by video and printer drivers, it just seems that way at times. I've seen a ton of wierd stuff with VB apps and video drivers, so switching development platforms may not be a panacea.

Ed
EMail: EdR@edrauh.com
"See, the sun is going down..."
"No, the horizon is moving up!"
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