Having trouble with WPF sample in 2018 .net devkit? It is reported that dagexplorer command won't reopen a closed window in Maya 2018. This could be fixed with following modification: Replace MGlobal.executeCommand($@"catch (`showWindow ""{hostTitle}""`);"); with MGlobal.executeCommand($@"catch (`workspaceControl -e -visible true ""{hostTitle}""`);"); To make the window showing again. Read more →