Quote Originally Posted by aamer4yu View Post
I guess you are messing with the tab bar and tab widget.
PLCconfig->show();
I guess that should be tab_3->show();
or main_tab_widget->show();

I guess you are not showing the parent widget and somehow messing with tab widget.
PLCconfig,ECLogic_Lnx are different ui names iam calling that ui's in tab bar and placing in main_tab_widget.,so me facing problem in writing the connections to treewidget,where items like plc,...etc has to click,when we click on plc (QTreewidgetItem) the PLCconfig(ui) has to open,then when we click on ECLOGIC-lnx(QTrreewidgetItem)the ECLogic-LNX(ui)has to open,.............

please kindly go through the code and image(treewidget) which i posted and plz give me the solution.