Part Modeling > Resolving Regeneration Failures > No Resolve Mode > To Undo Changes in No Resolve Mode
  
To Undo Changes in No Resolve Mode
When a new feature fails to regenerate, you can undo the changes that caused the failure. The following changed items are restored to their pre-regeneration values:
• Dimensions
• Parameters
• Relations
Feature operations that trigger regeneration of the failed feature are undone. When no backup models exist, the following feature operations are not undone:
Feature Operation
Example
Feature resume operation
Selecting a suppressed feature, right-clicking, and choosing Resume
Operations that trigger a full assembly regeneration
Updating an assembly cut
Regeneration failures that do not involve feature operation or dimension changes
Missing external references