Stock model layer disappearing.

[Yendor]

Im using Hypermill 2009.1 I have a stock model with the finished part model inside on seperate layers. When trying to define the stock model it says that it is an open model, model analysis shows no warnings. After that the layer will not display, even though the display toggel shows it as displayed. The green box turns gray. The rest of the layers display fine. Any suggestions on what Im doing wrong? Thanks.

[Yendor]

Thanks for your help today Alan Z.