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Reply To: Application crashes when acquiring image

Forums › TWAIN Classic › Application crashes when acquiring image › Reply To: Application crashes when acquiring image

June 23, 2009 at 2:46 pm #24921
jimwatters
Participant
  • Topics - 2
  • Replies - 72
  • Total Posts - 74

To help figure out what is happenings you could compare the log files generated by twain_32.dll when using your app and twacker.
The log file is stored in your temp folder
%temp%twain.log

Whenever you receive a TWRC_FAILURE you should do a DG_CONTROL / DAT_STATUS / MSG_GET to find out why the previous message failed.

The problem might be a sequence error. The order of capability negotiation is discussed in the TWAIN spec on p600(A-34). Transfer mode should be negotiated first.

twain_32.dll provides a method to expose WIA drivers as limited twain drivers. For best TWAIN support use the real TWAIN driver.

Regards,
Jim Watters

**************************************************
JFL Peripheral Solutions Inc.
http://www.jflinc.com/
Your Expert Source of Custom Software and Services
for TWAIN Applications, Data Sources,
Peripheral Drivers and Support Software.
**************************************************

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