IcenDy

> @zainmehdi I followed yours and installed it suscessfully! > but i got this,error while loading shared libraries: libQGLViewer-qt5.so.2: cannot open shared object file: No such file or directory >...

@zainmehdi Thanks for your response. I use Qt 5.12 on fedora 33 because ubuntu 18.04 can't be installed on my device. I uninstalled and reinstalled g2o. g2o_viewer can be open...

Thanks for your help. I try it with sudo and su- and g2o_viewer can show correctly(but 'su' still has error). T here are the interface of g2o_viewer and shell on...

@zainmehdi The above is the wrong interface(su). It can work correctly now.