why boolean not work on solidfy modifier I have a normal plane and a cube. I have given little thickness to the plane. and i want just cut a hole in that plane. I have to model in the file.
to my right hand what i want to achieve. The problem is that with the normal boolean tool its not working. I have install the booltron addon and go the result. to the left hand is the sample to experiment. I have acheive what i want to from booltron but the problem is that the solidfy modifier apply automatically with that. Is there any option or other way i can cut the hole in that plane without apply the solidify modifier.   blend file here https://drive.google.com/open?id=0BwiTD4qoMzsZT1FxOTdoX0drQVk

boolean did not work with the steps
Select the Plane
Add a boolean modifier.
Set the Object property to the Cube.
Set the Operation property to Difference.