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Date Posted: 12:10:18 03/05/03 Wed
Author: Michel
Subject: Re: aquire error message
In reply to: peter heijmans 's message, "Re: aquire error message" on 01:46:26 02/27/03 Thu


Hi Peter,

I am not sure what to suggest at this point. I would make sure you have the latest twain DLL's, from www.twain.org.

I would also check for the latest drivers from the scanner manufacturer.

The last resort good be use something like the exception dialog in the Jedi library, <a rel=nofollow target=_blank href="http://sourceforge.net/projects/jcl/">http://sourceforge.net/projects/jcl/</a> which can display the exact call stack when an exception occurs. Exceptional magic can also do this. I have a feeling this is happening in a DLL (either twain or the scanner driver) though.

Best regards,

Michel


>Hello Michel
>
>yes, the floating point error after the
>TScanner.Acquire call (in the procedure "
>ProcessImages( AcquireEvent,
>@FTwainData.SourceId,
>@FTwainData.AppId,
> FTwainData.DsmEntry, CallBackData););"
>
>in the procedure TScanner.Acquire of het untit EnScan;
>
>I hope theis makes it clearer to you
>
>regards
>
>peter
>
>
>
>
>>Hi Peter,
>>
>>Usually, there is not much I can do on these problems
>>because I cannot reproduce them. One thing I did
>>forget to mention, do not run your program from the
>>Delphi IDE with debugging turned on. This can
>>interfere with twain.
>>
>>I have seen some scanner drivers that work in "test"
>>mode without having to connect a physical scanner. If
>>this is the case I may be able to try it out.
>>
>>If the error is after the twain scanning itself, than
>>it may be something else. Is the floating point error
>>after the TScanner.Acquire call?
>>
>>Best regards,
>>
>>Michel
>>
>>
>>
>>>>
>>>hello Michel
>>>
>>>I installed the demoversion 2, but still I am getting
>>>the same mistake
>>>
>>>regards
>>>
>>>peter
>>>
>>>>Hi Peter,
>>>>
>>>>The problem I was mentionning is actually a problem
>>>>with Delphi and the Trunc implementation affect
>>>>external DLL's like train drivers.
>>>>
>>>>
>>>>Version 1.1 does not use the new SafeTrunc. Can you
>>>>try it with the version 2 evaluation units? Let me
>>>>know if you still get the error.
>>>>
>>>>Best regards,
>>>>
>>>>Michel
>>>>
>>>>
>>>>>hello Michel
>>>>>
>>>>>I am using Envision Version 1.10 with Delphi 5.0
>>>>>Professional.
>>>>>The problem only accures when using Envision, when
>I
>>>>>use Micrograph Picture Publisher then there is no
>>>>>problem.
>>>>>Also the scanning in itself is no problem, only
>when
>>>I
>>>>>am making a prescan
>>>>>I am hoping for a soluton, as the application I
>made
>>>>>with envision works perfect
>>>>>The error message also accures when using the
>>>examples
>>>>>
>>>>>regards
>>>>>
>>>>>Peter
>>>>>
>>>>>rega
>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>>Hi Peter,
>>>>>>
>>>>>>I have not seen this before. Which version of
>>>>Envision
>>>>>>are you using? One user has reported a strange
>>>>>>interaction between Trunc and some DLLs from twain
>>>>>>drivers. Version 2 uses a new SafeTrunc routine to
>>>>>>workaround this problem.
>>>>>>
>>>>>>I would also look into if you scanner has updated
>>>>>>drivers.
>>>>>>
>>>>>>Best regards,
>>>>>>
>>>>>>Michel
>>>>>>
>>>>>>>hi,
>>>>>>>
>>>>>>>when I make a prescan I get an error message
>>>>"invalid
>>>>>>>floating point operation"when the scan finishes
>>>>>>>
>>>>>>>the sanning in itself goes well
>>>>>>>
>>>>>>>have you got a solution
>>>>>>>
>>>>>>>peter

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