App is terminated on DS open [WIN32]

[Billie]

Hy all!

My App is written in Java and C. It works fine on the TWAIN sample sources but now I have to use the DS from a specific Vendor.

When I start my app within Visual Studio or from Command line everything works fine.

When I start my app within Eclipse IDE, the App terminates on OPENDS command without any error, message, dump – just stops.

TWAINDSM Log:

[190638310 dsm.cpp   398   183 00000F10] TWAIN Working Group



[190638310 dsm.cpp   399   183 00000F10] TWAIN 32 Source Manager (Image Acquisition Interface)



[190638310 dsm.cpp   400   183 00000F10] version: 2, 1, 1, 0



[190638310 dsm.cpp  2239   183 00000F10] DG_CONTROL/DAT_PARENT/MSG_OPENDSM



[190638310 apps.cpp  351   183 00000F10] Application: "Allgemeines Rechenzentrum GmbH"



[190638310 apps.cpp  352   183 00000F10]              "SBP"



[190638310 apps.cpp  353   183 00000F10]              "SBProxy" version: 2.0



[190638310 apps.cpp  354   183 00000F10]              TWAIN 2.1



[190638310 apps.cpp 1375   127 00000F10] Could not find DS_Entry function in DS: C:WINDOWStwain_32wiatwain.ds



[190638310 apps.cpp  645   127 00000F10] Condition Code: DS or DSM reported error, application shouldn't



[190638310 apps.cpp 1388   127 00000F10] Loaded library: C:WINDOWStwain_32SampleTWSRC_32.ds



[190638310 apps.cpp 1388     0 00000F10] Loaded library: C:WINDOWStwain_32sample2TWAINDS_Sample32.ds



[190638388 apps.cpp 1388  1170 00000F10] Loaded library: C:WINDOWStwain_32USB2800emTwain.ds



[190638388 dsm.cpp  2274    18 00000F10] TWRC_SUCCESS





[190638388 dsm.cpp  2239     0 00000F10] DG_CONTROL/DAT_ENTRYPOINT/MSG_GET



[190638388 dsm.cpp  2274     0 00000F10] TWRC_SUCCESS





[190638388 dsm.cpp  2239     0 00000F10] DG_CONTROL/DAT_IDENTITY/MSG_USERSELECT



[190639982 dsm.cpp  2274     0 00000F10] TWRC_SUCCESS





[190639982 dsm.cpp  2239     0 00000F10] DG_CONTROL/DAT_IDENTITY/MSG_OPENDS



[190639982 apps.cpp 1320     0 00000F10] Datasource: "USB 2800"



[190639982 apps.cpp 1321     0 00000F10]             "Digital Camera"



[190639982 apps.cpp 1322     0 00000F10]             "MAKU USB Camera 1" version: 1.603



[190639982 apps.cpp 1323     0 00000F10]             TWAIN 1.6



[190640013 apps.cpp 1388  1170 00000F10] Loaded library: C:WINDOWStwain_32USB2800emTwain.ds

The sample sources work also when I start within Eclipse.

So is it possible that the DSM causes the problem or does my App or the DS something wrong?

Best regards,
Billie

[jimwatters]

The fact it is failing inside loadlibrary it sounds like it is a problem of the DS.
Have you tried the sample applications? Or other TWAIN applications?
Are you providing a hWnd for your application when you do a OpenDSM? Even if you are a command line application you need to provide HWND.

Jim Watters

[Billie]

Hello Jim!

I do just like the TWAIN FreeImage Sample (TwainAppCMD). So on OpenDSM i provide a NULL-Pointer and on EnableDS i provide the DesktopWindow reference.

This works fine for both Sample Sources (FreeImage and the old one). But I also tried with a new window – the same matter, Sample Sources work, the other not.

I tried with the Sample App (GUI and CMD-Line), the Source works – so does my App when I don’t start it within Eclipse IDE.

One More: The “Loaded library:” debug string is printed after the DS library is loaded, so maybe the DS_Entry call fails?

[jimwatters]

It could be a problem related to working folder and what DLLs are in your path.
Use Depends on the .ds file to check if anything is missing.
http://dependencywalker.com/

Jim Watters

[Billie]

Hy Jim!

Just the “DWMAPI.DLL”.

[Author]

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