How to fix INET error "Cannot load library"

Question

I am using OMNeT++ 5.5.1 and INET 4 in ubuntu 18.04. It was working fine. I copied some folders/files from other machine (done in ubuntu 19.04 with exactly the same OMNeT++ and INET version) to inet, and then rebuild inet successfully.

But the problem is when i am trying to run sensornetwork/omnetpp.ini, it is giving the following errors. Would anyone please suggest how to fix it? Thanks

<!> Error: Cannot load library '../../../src//libINET.so': ../../../src//libINET.so: undefined symbol: _ZN4inet8Protocol8smartmacE

End.

Simulation terminated with exit code: 1
Working directory: /home/tech/Downloads/inet4/showcases/wireless/sensornetwork
Command line: opp_run -m -n ../../../src:../../../examples:../../../tutorials:../.. --image-path=../../../images -l ../../../src/INET omnetpp.ini

Environment variables:
PATH=/home/tech/Downloads/omnetpp-5.5.1/bin::/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/tech/Downloads/omnetpp-5.5.1/bin
LD_LIBRARY_PATH=/home/tech/Downloads/omnetpp-5.5.1/lib::/home/tech/Downloads/inet4/src:
OMNETPP_IMAGE_PATH=/home/tech/Downloads/omnetpp-5.5.1/images

Rudi Rudi · Accepted Answer · 2021-01-11T12:28:31

Make sure to run make cleanall, then make makefiles and then rebuild the whole INET project. This is a linker error, and looks like some object files were not linked in correctly. Specifically this could happen if the Makefile is not re-created after you add additional .cc files to a project. (you did not specify what file you have copied from the other machine, but if you have copied .cc files, then the above can happen).

TIP: You have to re-create the make files each time you add new source files to your project (the IDE, does it for you, but on the command line, you must do it manually)

How to fix INET error "Cannot load library"

1 Answers