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Date Posted: 01:46:26 02/27/03 Thu
Author: peter heijmans
Subject: Re: aquire error message
In reply to: Michel 's message, "Re: aquire error message" on 17:57:00 02/25/03 Tue

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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