1. Create a worksheet with 4 columns data.

2. Select X Y Error template (menu Plot:Basic 2D:X Y Error) to open Plot Setup dialog.

3. Set A,B,C,D to X, xEr, Y, yEr and OK

==>X error bars are not added. Open PD dlg, under X Error Bar tab, uncheck X error bar box and check again and apply, the x error comes back.