Can't find header file

[mukundhan3]

Hi,
After applying the patch file when I try to build , an error occured stating that the header file (/home/drive/Desktop/PyOrb/ORB_SLAM2-master/Thirdparty/g2o/g2o/types/../core/openmp_mutex.h:30:26: fatal error: ../../config.h: No such file or directory) is missing. Can you please help me out with this?

Thanks in advance

[jskinn]

You need to build all the dependencies in the Thirdparty folder of ORBSLAM2, have a look at build.sh.
You can fix this by simply running build.sh, and then running make install.