Class "Veins::ObstacleControl" not found - omnet++

Question

I have followed step by step the tutorial to install Veins, but when I tried running the example scenario (final step) I ended up with the above error.
The whole error was:
Error in module (cModule) RSUExampleScenario (id=1) during network
setup: Class "Veins::ObstacleControl" not found -- perhaps its code
was not linked in, or the class wasn't registered with
Register_Class(), or in the case of modules and channels, with
Define_Module()/Define_Channel().
TRAPPING on the exception above, due to a debug-on-errors=true
configuration option. Is your debugger ready?
Simulation terminated with exit code: -2147483645 Working directory:
C:/Users/user/src/veins-4.3/examples/veins Command line:
../../../omnetpp-4.6/bin/opp_run.exe -r 0 -n .;../../src/veins
--tkenv-image-path=../../images -l ../../src/veins omnetpp.ini
I don't think I have missed a step during the tutorial as I have tried it two times. I did not make any change in anything, I've just strictly followed the tutorial like a robot, so I cannot provide an MCVE with more details than the tutorial.
Here is what I'm using:
- Windows 7 Pro 64 bits
- SUMO 0.25.0 64 bits
All other steps of the tutorial successfully worked until the final step.

Answer 1

I assume this error occurs when running Veins via the OMNeT++ IDE. Or, if you have compiled it with GCC (The error does not happen if you use CLANG)
There are two ways to bypass this error:
Use the .run as executable from your examples directory, which calls veins/run and includes all the required libraries:
Use opp_run as executable and set dynamic libraries to the directory where libveins.so is located (usually src/veins)
PS: to answer #ChristopSommer questions: Veins::ObstacleControl appears in opp_run -l src/veins -h classes
This could be a solution too, but I never tested it: Compiler flags in Eclipse