Creo Interactive Surface Design (Style) > Regeneration > About Resolve Mode
  
About Resolve Mode
You can set the regen_failure_handling configuration option to determine the mode for resolving regeneration failures when they occur:
no_resolve_mode—The Resolve dialog box does not open automatically, you have to take active steps to open it. You can exit Style even when the Style feature contains failed entities. The Style feature will be displayed as failed in the Model Tree. This is the default.
resolve_mode—You must resolve all entities before you exit Style. Inside Style, you can continue to work with a Style feature that has unresolved internal entities. The Resolve dialog box opens automatically under the following conditions:
You attempt to exit Style and there are failed features.
You attempt to regenerate a failed feature.