RVT 2013: Trouble Switching one piece of equipment for another.

[cmannion394476]

Hello everyone.

I'm having a bit of trouble switching out a exhaust fume hood for a laminar flow bench for a clean room laboratory.

Both families were created by me from scratch, and are listed as mechanical equipment.

However, when I have the fume hood selected, I cannot change it to the laminar flow bench from the properties pull down for mechanical equipment.

The laminar flow doesn't even show up on the list.

But when I have the fume hood selected I am able to change it to the laminar flow bench.

Would anyone know why two mech equipment families supposedly identical in setup behave this way?

I would be thankful for any advice.