This is a post by Evan Winter in his presentation.

Identifies numerous config options in Creo Parametric that impacts how constraints are applied to assemblies by default.

  1. set auto_constr_always_use_offset to Never

This config option controls whether the automatic constraint creates offsets.

Available options are –

yes—Automatic constraint always creates an offset, Distance constraint

no—Automatic constraint snaps Coincident Align or Mate if surfaces are within tolerance

never—Use Coincident as the default constraint type.

For more information, check out slide 21, 22 of his presentation here.

Content Source: Evan Winter/PTC