Reply To: [Urgent] Critical issue with TWAIN DSM 2.0 and Windows Vista

[lcarrere]

Hi Jim,

First, thank you for your assistance.

I’ve made what you suggested, however the generated log become empty each time I try to open a Data Source. If I just open your demo application which open the Data Source Manager, the created log reports some operations (but I don’t think this can help you).

I’ve made test on my development computer (Vista Premium 32bit) with difference configurations:

– With / without antivirus
– With / without UAC
– Always with TWAINDSM.DLL 2.0.5
– Always using Administrator account

All my tests fail using the TWAIN_App_mfc32.exe after trying to open a source.

See these 2 screen captures.

Step1:
I start the TWAIN_App_mfc32.exe application. The TWAIN DS are succefully listed. At this step, if I close the application a log are generated.

– The capture screen: http://www.gdpicture.com/twainorg/step1.png
– The content of the log:

[113006408 dsm.cpp   398   183 000015B8] TWAIN Working Group



[113006408 dsm.cpp   399   183 000015B8] TWAIN 32 Source Manager (Image Acquisition Interface)



[113006408 dsm.cpp   400   183 000015B8] version: 2.0



[113006408 dsm.cpp  2028   183 000015B8]



[113006408 dsm.cpp  2029   183 000015B8] DG_CONTROL/DAT_PARENT/MSG_OPENDSM



[113006408 apps.cpp  215   183 000015B8] Application: "App's Manufacturer"



[113006408 apps.cpp  216   183 000015B8]              "App's Product Family"



[113006408 apps.cpp  217   183 000015B8]              "Specific App Product Name" version: 1.0



[113006408 apps.cpp  218   183 000015B8]              TWAIN 2.0



[113006409 apps.cpp 1200   127 000015B8] Could not find DS_Entry function in DS: C:Windowstwain_32wiatwain.ds



[113006409 apps.cpp  528   127 000015B8] Condition Code: DS or DSM reported error, application shouldn't



[113006410 apps.cpp 1213     0 000015B8] Loaded library: C:Windowstwain_32escndvperv200.ds



[113006413 apps.cpp 1213     0 000015B8] Loaded library: C:Windowstwain_32HP559TWHP559TW.DS



[113006417 apps.cpp 1213     0 000015B8] Loaded library: C:Windowstwain_32hpsj_0000hpsj_0000.ds



[113006420 apps.cpp 1213     0 000015B8] Loaded library: C:Windowstwain_32hpsj_0003hpsj_0003.ds



[113006421 dsm.cpp   596    18 000015B8] TWRC_SUCCESS



[113006421 dsm.cpp  2028    18 000015B8]



[113006421 dsm.cpp  2029    18 000015B8] DG_CONTROL/DAT_NULL/MSG_GET



[113006421 dsm.cpp   596    18 000015B8] TWRC_SUCCESS



[113006421 dsm.cpp  2028    18 000015B8]



[113006421 dsm.cpp  2029    18 000015B8] DG_CONTROL/DAT_IDENTITY/MSG_GETFIRST



[113006421 dsm.cpp   596    18 000015B8] TWRC_SUCCESS



[113006421 dsm.cpp  2028    18 000015B8]



[113006421 dsm.cpp  2029    18 000015B8] DG_CONTROL/DAT_IDENTITY/MSG_GETNEXT



[113006421 dsm.cpp   596    18 000015B8] TWRC_SUCCESS



[113006421 dsm.cpp  2028    18 000015B8]



[113006421 dsm.cpp  2029    18 000015B8] DG_CONTROL/DAT_IDENTITY/MSG_GETNEXT



[113006421 dsm.cpp   596    18 000015B8] TWRC_SUCCESS



[113006421 dsm.cpp  2028    18 000015B8]



[113006421 dsm.cpp  2029    18 000015B8] DG_CONTROL/DAT_IDENTITY/MSG_GETNEXT



[113006421 dsm.cpp   596    18 000015B8] TWRC_SUCCESS



[113006421 dsm.cpp  2028    18 000015B8]



[113006421 dsm.cpp  2029    18 000015B8] DG_CONTROL/DAT_IDENTITY/MSG_GETNEXT



[113006421 dsm.cpp   596    18 000015B8] TWRC_ENDOFLIST



[113006421 dsm.cpp  2028    18 000015B8]



[113006421 dsm.cpp  2029    18 000015B8] DG_CONTROL/DAT_IDENTITY/MSG_GETDEFAULT



[113006421 dsm.cpp   596    18 000015B8] TWRC_SUCCESS



[113006421 dsm.cpp  2028     0 000015B8]



[113006421 dsm.cpp  2029     0 000015B8] DG_CONTROL/DAT_PARENT/MSG_CLOSEDSM



[113006421 dsm.cpp   596     0 000015B8] TWRC_SUCCESS

Step2:

If I try to open a TWAIN DS (I’ve tested with all) the application simply crashes and the generated log is empty.

See the screenshot: http://www.gdpicture.com/twainorg/step2.png

I’ve made other tests:
– Using my own TWAIN dll based on the twain toolkit: fail when sending MSG_OPENDS If link to twaindsm.dll, success if I link the twain_32.dll.

– Using the twack_32 exe: fail when sending MSG_OPENDS If link to twaindsm.dll, success if I link the twain_32.dll.

One strange behaviour: If I call my own twain dll (based on TWAIN toolkit) from a vb.net / c# application, the crash occurs. If I call the dll from a vb6 application: no problem ! Maybe this detail can help…

I hope I was clear enough. If you need more details or deeper test I will be happy to assist.
I’ve past many hours on this issue and my conclusion is that there is a problem with the last DSM & Vista (but maybe I’am wrong ). 🙂

Kind regards,

Loïc Carrère

PS: Full success under Windows XP

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GdPicture Imaging SDK
Imaging Toolkits for developers .NET & ActiveX
http://www.gdpicture.com
Image Processing, TWAIN scanning, OCR, PDF/A