Hi Remi, thank for your quick reply!
Yes, tessDataPath is the same folder both for Release and Debug.
My Web Application is structured as follows

\bin --> contains tessnet2.dll
\obj --> contains Debug and Release folders
\Web --> contains application pages
\Web\Home\frm_HOM.aspx --> main page
\Web\Home\frm_HOM.aspc.cs --> main page codebehind
\Web\Images --> contains all images to be OCRed
\Web\tessdata --> contains "eng" and "ita" languages tessdata folders

I tested also your latest dll, but, unfortunately, the behavior is the
same. I will go more in details.
Lets call "RunDebug" when you select from VS2005 the menu item Debug |
Start Debugging, and "RunWODebug" when you select Debug | Start
Without Debugging. After every run, I close .NET Development Server
(WebDev.WebServer.exe) for reset all sessions. Here are all results:

Debug, RunDebug --> OK
Debug, RunWODebug --> error
Release, RunDebug (makes no sense for me, but...) --> OK
Release, RunWODebug --> error

Also, if I RunNoDebug after a RunDebug without resetting Development
Server, it works correctly. If I RunDebug without set breakpoints, it
works correctly.

Hope this helps for pointing out what could have been happened to the
dll.
Please let me know if I have to try some other things. Thank you!
Best Regards
ZioZione


On 28 Apr, 11:56, Remi  Thomas <[email protected]> wrote:
> Hi,
>
> Is tessDataPath is the same in release and debug mode?
> I did change a compilation option in tessnet2.dll, please try with the
> new one.http://www.pixel-technology.com/freeware/tessnet2/bin.zip
>
> Remi
>
> On Apr 28, 9:09 am, ZioZione <[email protected]> wrote:
>
> > Hi everybody,
> > I am writing a C# Web Application that must perform OCR over various
> > TIFF files. I am using the latest tessnet2 release (april 21, 2009).
> > Here is the codebehind of my page:
>
> >         tessnet2.Tesseract ocr = null;
> >         string tessImgPath = "";
> >         string tessDataPath = "";
>
> >         protected void Page_Load(object sender, EventArgs e)
> >         {
> >             InitialiseData();
>
> >             tessImgPath = Server.MapPath("../Images/P0028594.tif");
> >             Bitmap image = new Bitmap(tessImgPath);
>
> >             List<tessnet2.Word> m_words;
> >             m_words = ocr.DoOCR(image, Rectangle.Empty);
>
> >             if (m_words != null)
> >             {
> >                 int lc = tessnet2.Tesseract.LineCount(m_words);
> >                 for (int i = 0; i < lc; i++)
> >                 {
> >                     Response.Write(tessnet2.Tesseract.GetLineText
> > (m_words, i) + "<br>");
> >                 }
> >             }
> >         }
>
> >         void InitialiseData()
> >         {
> >             ocr = new tessnet2.Tesseract();
> >             tessDataPath = Server.MapPath("../tessdata");
> >             ocr.SetRootPath(tessDataPath, "ita");
> >             ocr.Init("ita", false);
> >         }
>
> > I have the following problem: if the application is running in Debug
> > mode, it works correctly, while running in Release mode (or also Start
> > Without Debugging), the row
>
> > ocr.Init("ita", false);
>
> > causes following error:
>
> > Attempted to read or write protected memory. This is often an
> > indication that other memory is corrupt.
>
> > Here is the Stack Trace:
>
> > [AccessViolationException: Attempted to read or write protected
> > memory. This is often an indication that other memory is corrupt.]
> >    fgets(SByte* , Int32 , _iobuf* ) +0
> >    read_word_list(SByte* filename, UInt64* dawg, Int32 max_num_edges,
> > Int32 reserved_edges) +562
> >    init_permute() +543
> >    program_editup(SByte* configfile) +335
> >    tessnet2.Tesseract.Init(String lang, Boolean numericMode) +66
> >    SDG_MODI.Web.Home2.Home.InitialiseData() in C:\Produzione
> > \PROGETTI_NET\SDG_MODI\SDG_MODI\Web\Home2\frm_HOM2.aspx.cs:110
> >    SDG_MODI.Web.Home2.Home.Page_Load(Object sender, EventArgs e) in C:
> > \Produzione\PROGETTI_NET\SDG_MODI\SDG_MODI\Web\Home2\frm_HOM2.aspx.cs:
> > 28
> >    System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp,
> > Object o, Object t, EventArgs e) +15
> >    System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object
> > sender, EventArgs e) +33
> >    System.Web.UI.Control.OnLoad(EventArgs e) +99
> >    System.Web.UI.Control.LoadRecursive() +47
> >    System.Web.UI.Page.ProcessRequestMain(Boolean
> > includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
> > +1436
>
> > What I have to do for avoid this error?
> > Another question: I need also to show the TIFF image into the Web
> > page. Actually it seems not possible, so I think I need some code to
> > perform a conversion between TIFF and, i.e., JPG. Can someone point me
> > out to some useful code? Thank you!
> > Best Regards
> > ZioZione
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