HEY all.

I have a problem using the VSBV command in ansys.

I have created two bricks on top of eachother and want to subtract a cylinder volume through these.

I named the bricks TOP and BUND by using the command:

CM,BUND,VOLU ect.

and want to create and subtract the cylinder using these commands:

CYLIND,d/2,,-h,h,,
CM,CYL,VOLU
VSEL,,,,TOP,,,1
VSEL,,,,BUND,,,1
VSEL,,,,CYL,,,1
VSBV,ALL,CYL,,,

but ansys gives me the error 'Volume list to be subtracted is empty.'

Please write if you know what to do.

best regards Claus