Re: Problem opening a set with more than 500 items.
When you say you have a "set of 500 elements", do you just mean your assembly has about 500 components/objects or is this somehow related to a family table?
The reason I ask is that my company has seen an issue with tremendous slowness in Wildfire 5 (M100 and M110) with large family tables. PTC has promised a fix in M120 which should be released within the next few weeks. Assemblies which opened in 2 minutes on Wildfire 2 and 3 took up to 15 minutes to open in Wildfire 5.
I don't think this is related to what you're seeing but if you have library components (fasneters, etc) with large family tables, perhaps this helps explain the slowness?
I'm sorry I don't have anything to contribute regarding the "Reactivate" window. I've only seen that on a few occasions. Maybe someone else will have some input.