Expand Clipping Box Limits

Hi all, In AVEVA E3D 3.1.6.1, when I press the "Expand Clipping Box Limits" button and enter a value (10ft for example), the object disappear from the view... Anyone has some suggestion on how to use this command properly? Or any idea why? Thanks!!

https://help.aveva.com/AVEVA_E3D_Design/3.1/#/home/1057618/10/11