convert the solid works assembly in *.hsf file format and that file when open in other software or e-drawing it face problem like data recogination and data loss.
as my practise this is mostly with multibody part.
as i assemble the individual parts not any (multibody) then there is no problem found with that, but i think there must be a better solution for this,
to get rid of this problem.
please check the attached file.