QT Path for Omnet++ in ubuntu 22

Question

I am getting the following error in Omnet++ 6.0.1:

/home/dice/Mohsan_Simulatiom_directory_C2JN_project/softwares_/omnetPP_distribution/omnetpp-6.0.1/samples/microservicesapiplacement_6_22_2023/src/microservicesapiplacement_6_22_2023: /lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.15' not found (required by /home/dice/Mohsan_Simulatiom_directory_C2JN_project/softwares_/omnetPP_distribution/omnetpp-6.0.1/lib/liboppqtenv.so).

So my question is how to explicitly specify the Omnet++ to use the QT5.15 in path /home/anaconda3/lib instead of the /lib/x86_64-linux-gnu/libQt5Core.so.5, where it was not able to find it. Secondly, what is the method to explicitly install the QT5.15 in path /lib/x86_64-linux-gnu?. Note that the application developed in Omnet++ did not have any programming mistakes so its build process (through Clang) was successful. The problem is during the execution, eclipse (IDE for Omnet++) continuously tries to find the QT5.15 version in the path /lib/x86_64-linux-gnu.

To work around this error, I tried the command qmake --version which returned

QMake version 3.1
Using Qt version 5.15.2 in /home/anaconda3/lib

By this answer, I tried to export an activated path using
export LD_LIBRARY_PATH=/home/anaconda3/lib:$LD_LIBRARY_PATH.
The command ls -al /lib/x86_64-linux-gnu/libQt5Core.so.5 returned me

lrwxrwxrwx 1 root root 20 janv. 5 2022 /lib/x86_64-linux-gnu/libQt5Core.so.5 -> libQt5Core.so.5.12.8].

Another command ls -la /usr/lib/x86_64-linux-gnu/libQt5C* returned me the following:

-rw-r--r-- 1 root root 1196 janv. 5 2022 /usr/lib/x86_64-linux-gnu/libQt5Concurrent.prl
lrwxrwxrwx 1 root root 26 janv. 5 2022 /usr/lib/x86_64-linux-gnu/libQt5Concurrent.so -> libQt5Concurrent.so.5.12.8
lrwxrwxrwx 1 root root 26 janv. 5 2022 /usr/lib/x86_64-linux-gnu/libQt5Concurrent.so.5 -> libQt5Concurrent.so.5.12.8
lrwxrwxrwx 1 root root 26 janv. 5 2022 /usr/lib/x86_64-linux-gnu/libQt5Concurrent.so.5.12 -> libQt5Concurrent.so.5.12.8
-rw-r--r-- 1 root root 31400 janv. 5 2022 /usr/lib/x86_64-linux-gnu/libQt5Concurrent.so.5.12.8
-rw-r--r-- 1 root root 1240 janv. 5 2022 /usr/lib/x86_64-linux-gnu/libQt5Core.prl
lrwxrwxrwx 1 root root 20 janv. 5 2022 /usr/lib/x86_64-linux-gnu/libQt5Core.so -> libQt5Core.so.5.12.8
lrwxrwxrwx 1 root root 20 janv. 5 2022 /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 -> libQt5Core.so.5.12.8
lrwxrwxrwx 1 root root 20 janv. 5 2022 /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.12 -> libQt5Core.so.5.12.8
-rw-r--r-- 1 root root 5519624 janv. 5 2022 /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.12.8

Answer 1

Check the path to your qmake (for example using which qmake) and then open configure.user from main directory of your OMNeT++, uncomment and set that path in QMAKE.
Then recompile your OMNeT++ - i.e. ./configure, make.