Package Keepin & Route Keepin subclass fillet or compose

Hi,

I want to compose - or fillet - Package & Route Keepin subclasses. I activate them using shape->select Shape or Void/Cavity and then try composing them using shape->Compose Shape. But it doesn't work. Below are messages I see in command:

Processing the selected segments. For a large number of segments, this may take a few minutes.
Use the "Close Shape" option from the RMB popup to close any shape(s) left open.
A total of 1 shapes were created.
Enter selection point
W- (SPMHA1-233): Package keepin rectangle already exists.

Can anybody tell me weather I can smoth my rectanglesin mentioned subclasses or not?

Thanks in advance,

Hossein