UDIM Maya/SubP setup issues

I set up a 3u x 3v tile set in Maya. I only used 3u x 3v of the tile set. Imported to Subp and completed textures. I exported finished textures using Arnold. Connected maps to ai shader and turn on udim. Now onlythe textures in 3u x 0v are recognized. What could I have done wrong? Objects are all seperate. I tried combining them. That didn't work.