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Sometime you will find more executables in the same package. Of course they are compiled with different name_file.cpp files. Look into you CMakeLists.txt and be sure you don t have 2 times the same add_executable. For istance:

add_executable( my_robot src/main_a.cpp )
add_executable( my_robot src/main_b.cpp )   <= this is redundant with the line above

Hope it helps

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