Assembly - Limiting component movement

If I place a new component into an assembly, I can move that part into any position (o.k.). When I mate one flat surface of the part to one flat surface of the assembly, say the XY plane, I can move the part to any place on that plane (o.k.). But, when I make a second constraint, say mating it to the YZ plane, the part loses all mobility (not o.k.). It seems that I ought to still be able to move the part along the Y axis until I mate it to the XZ plane.

Any suggestions?

Thanks

Are you selecting faces or edges for all of these mates? Are there any other mates besides the two you mentioned?

Works here?

Attach your assembly here.

Turn on DOF glyph. Ctrl Shift E

What version of Inventor?

All Service Packs installed?

Did it ever work correclty on this machine?

Good news - I can't recreate the problem

Bad news - nothing learned

I guess the problem stemmed from building an assembly by creating parts in the assembly file, each new one dependent in place and size on what was already there. With a three part assembly built this way I then added a previously built component. This last additional part would become totally fixed with only two constraints.

Clue - when I turned "Adaptive" to OFF, the last part had the freedom I was expecting (although everything else gained unwanted freedom at that time as well).

(Things are working form me now as I am only placing components rather than creating them in place.)

When you create parts inside an assembly and you select another part for its plane, Inventor will place a constraint. If you go into the Mates you can suppress this mate.