What is the 0x000007B error for a program written in QtCreator in C++ running on another computer?

Question

Qt

Has a simple console program. I do not want to spread the code, but I'm interested in solving the problem.
There is such error at start on the computer of other developer:

It was written in QtCreator.

Answer 1

This means that all libraries are loaded, but some are incompatible with each other. For example, the computer you are starting up already has some Qt5Core.dll version 5.2.1, and you built it with version 5.3.0, or msvcr * .dll is picked up, different from those with which the project was built. In the folder with the exe, in addition to the Qt libraries, put the necessary msvcr and msvcp

Answer 2

Most likely incompatibility in versions of DLL - by other machine the library of other version is picked up. For starters, it's worth looking at Dependency Walker, what the program drags along with it.

Answer 3

All libraries that your program uses next to exe, including QT ones.