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Date Posted: 23:22:20 03/29/02 Fri
Author: Brian Lowe
Subject: Re: Endless scanning
In reply to: Michel 's message, "Re: Endless scanning" on 06:34:55 03/27/02 Wed

Hi Michel,

GetAllImages is identical in my current version and in v2. It happens outside the IDE using Xerox WorkCentre 950 twain interface.

After the initial (successful) scan, the call in ConcludeTransfer to
{ acknowledge end of transfer }
CallTriplet( pSourceId, pAppId,
DG_CONTROL, DAT_PENDINGXFERS,
MSG_ENDXFER, @PendingXfers, @TwainResult, DsmEntry);

does not change the value of PendingXfers (= 341 before and after this call).

Any suggestions?

Also, I have a much improved (IMHO) rubber band selection unit. Would you like me to send it?

Thanks,
Brian

>
>Hi Brian,
>
>Compare your current EnTwain unit with the one from
>version 2. The "if not PendingTransfers then"
>statement should stop the loop.
>
>I think I recall seeing some twain interfaces, where
>you need to close the interface after scanning to
>return to the application.
>
>Also, make sure you test this when running your
>program outside the IDE. I have seen strange results
>scanning within the debugger.
>
>Best regards,
>
>Michel
>
>
>>My EnTwain unit loops for ever and has the following
>>code in GetAllImages. Did you ever fix this problem?
>>
>>ConcludeTransfer( PendingTransfers, pSourceId, pAppId,
>> DsmEntry );
>>
>>{ MB July 31, 1999. Twain message loop not terminating
>>properly }
>>if not PendingTransfers then
>> TwainQuit := True;
>>
>>Brian Lowe
>>Belleson Corp.

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