Problem: Feature class M domain information is lost for ArcGIS 8.0.2 models
A feature class may have an M domain that differs from the feature dataset. The schema wizard does not remember the M domain for each feature class between runs for models created with the ArcGIS 8.0.2 template.
This is a known limit.
Solution or Workaround
Set the M domain for each feature class every time the wizard is run, or migrate the model to ArcGIS 8.1.