I found a new (to me, maybe to you, too) use for Model Player ~ fixing assemblies. I created a new assembly from an existing one with 'Save a copy', replaced some components, then notices, after a regen that the first component was frozen. I did a search, using the Search tool for components with the Status of 'frozen' and found a few hundred of them. The loss of assembly constraints cascaded from the first frozen component (an ECAD export of a PWA).
I tried several different methods of trying to facilitate unfreezing or even getting to the frozen components, including Insert mode. That gave me the idea to try Model Player because it does the equivalent in a more dynamic way. The interesting thing about MP is that it has this button called 'Fix Model'. Pressing this throws you, temporarily and interactively, into Resolve mode where you can 'Redefine', 'Fix Model', etc.
The first great thing about this was that it cleared away all the later components so you could start from the beginning and regen or fix anything 'broken'. The second great thing was that after you fixed the frozen component, it resumed right where you left off. The third was that, unlike typical Resolve mode operation, it showed you the placed, frozen component so you didn't have to guess or figure out before hand what and where the component was/lived. The fourth was that it let you get inside groups/patterns to an individual component and redefine that without disturbing the pattern or group. When the lead component in a pattern was redefined, just pressing the advance button got each of the patterned elements regen'd with every button press. I got through the several hundred frozen components in a couple hours with minimal pain.
The only smarter way would have been to NOT use replace but to assemble the new components on top of the old, use the search to find everything that was a child of the mating surface and bulk Reroute the components to the new surface.
David Janes