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Hi, not sure how to solve this, but here are some ideas:

Maybe your compiler/linker uses another qt version than what is loaded at runtime? Find out what rgbdslam is compiled with (make VERBOSE=1) and linked against (ldd bin/rgbdslam|grep Q).

Maybe you need to adjust the environment variable LD_LIBRARY_PATH by adding the path of the correct Qt or putting it in front of the "incorrect" path. Or see if you can adapth the settings in CMakeLists.txt (the line "find_package(Qt4 REQUIRED"?) to use the other Qt version.

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