What's the difference between red and yellow errors?Red = The mate is being violated. The parts are not in the positions specified by the mate. Another cause could be that the mate is dangling because one of the entities (face, edge, plane, etc.) is no longer in the model. Investigate red errors first.
Yellow = The mate is satisfied, but another mate (usually red) is trying to move the parts in a way that would violate this mate. Another cause could be that this is a distance mate that is redundant to other mates in the assembly.
Example:
The left and right components are fixed. The blue component floats. A coincident mate, (Coincident1) is between the gray and blue blocks.
When you add another coincident mate (Coincident2) between the blue and orange blocks:
Coincident2 displays a red mate error because the parts cannot move as this mate requires.
Coincident1 displays a yellow mate error because the red mate error is trying to move the gray and blue components and violate Coincident1.
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