Unhandled exception in Release version of Feature Detection and Feature Matching with FLANN

c++
opencv

asked 2017-08-10 09:54:56 -0600

Hello folks,

I have OpenCV 3.2.0 installed on VS2017 CE. I built and compiled the tutorials on Feature Detection and Feature Matching with FLANN using code from http://docs.opencv.org/master/d7/d66/... and http://docs.opencv.org/master/d5/d6f/....

The debug version of the .exe files run successfully. However, the release version of both programs crash with the following warning:

Unhandled exception at 0x00007FFAF4DE3159 (opencv_xfeatures2d320d.dll) in flann.exe: 0xC0000005: Access violation writing location 0x000000000000001C. occurred

Please can anyone tell me how to fix this? Thanks

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did you build the opencv libs locally ? (afaik, the prebuild libs are for vs2015 only)

berak ( 2017-08-10 10:13:59 -0600 )edit

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Yes. I built the opencv libs locally using source files from GitHub. Thanks!

John Duke ( 2017-08-10 10:24:05 -0600 )edit

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answered 2017-08-10 11:06:35 -0600

berak
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updated 2017-08-10 11:08:35 -0600

you say: release version , but the msg is from a debug dll. please make sure to strictly use release libs with release build, and debug libs (with d at the end) with debug build

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Thanks! I think the release build inherited the debug dll. I have removed those and replaced with the release lib. However, I get the following error message:

opencv_core320.lib(matrix.obj) : error LNK2038: mismatch detected for '_ITERATOR_DEBUG_LEVEL': value '2' doesn't match value '0' in Source.obj 1>opencv_core320.lib(matrix.obj) : error LNK2038: mismatch detected for 'RuntimeLibrary': value 'MDd_DynamicDebug' doesn't match value 'MD_DynamicRelease' in Source.obj 1>opencv_core320.lib(alloc.obj) : error LNK2038: mismatch detected for '_ITERATOR_DEBUG_LEVEL': value '2' doesn't match value '0' in Source.obj

John Duke ( 2017-08-10 12:07:25 -0600 )edit

those are all things, that only should exist in a DEBUG build.

again, it's not your code, but your project is somewhat broken. (maybe start from scratch with an absolute empty one ?)

berak ( 2017-08-10 12:11:45 -0600 )edit

^^ oh, wait, that seems to be just the opposite version - debug build and release libs

berak ( 2017-08-10 12:31:11 -0600 )edit

I will rebuild it from scratch. The last errors are from the release build

John Duke ( 2017-08-10 16:26:53 -0600 )edit

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answered 2017-08-13 04:33:05 -0600

John Duke
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I discovered some files in the release library were missing so I rebuilt OpenCV 3.2.0 using the master and opencv_contrib source files. However, they were still missing after the rebuild.

I had to build OpenCV 3.3.0 using the master and opencv_contrib files. After linking the library, I can build the same code in both debug and release modes.

Thanks for your help!

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Unhandled exception in Release version of Feature Detection and Feature Matching with FLANN

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