Somehow, whenever opening assemblies with step or iges files using SoliWorks. All components are not constrained/mate to each other. Are there options when opening those files and keep all components constrained to each other?
STEP and IGES files are neutral formats that don't include assembly constraints.
You can fix all components in their imported positions, or assign SolidWorks mates to the imported models.
In another word, there are no other quicker way to resolve this. Just manually mate all components again.
Down and dirty would be to select all the parts and Fix them in place.
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