Hi Saad,Originally posted in cdnusers.org by Donald Telian
Black boxes are nice because you can put just about anything into them, yet they can cause connectivity issues. The tool needs you to tell it which pins follow through to other pins. This is done with the "Pin Connections" keyword in the DML. An example looks like:
(1 2 )
(2 1 ) )
In this case, pins 1 and 2 "connect" in both directions. If you do not have a statement like this, the circuit builder will complain that your circuit is not connected.
If you built your black box by hand you may be missing this section, which would explain the abort. Just look at a couple example models and edit it in. And watch those parens!
Hope that helps,