Subtracting array from solid

[Anonymous]

Hi!

I have the following issue:
I need subtract from big cylinder 20 small cylinders (the drawing is attached)

I created array of 20 cylinders, when  I try to subtract the autocad doesn’t see the cylinders as solid,

So I have to explode the array,

But then I should select them one by one.

If I try to use quickselect autocad doesn’t allow me to do that, since quickselect  is not transparent command.

All ideas are appreciated.

Thank you in advance.

I use autocad 2012.

[Patchy]

That's the way it works,

Explode it to make multiple of solids then use GROUP command and group P for previous, after that use SUBTRACT.

[Anonymous]

thank you!

I will try that!