What does this box mean?

hello; your obj file does not have any groups. you may have materials, just not groups. poser is not happy without groups.

Could you fill in some details of what you were doing just prior to receiving this error message. It may give us a better insight into how to answer.

I've seen that too: the Ichiro suit n tie figure gives you that message four times before opening the file.

Well, i had created a new V3 model to test the bikini by applying morphs to the V3 body. Everything worked and i saved it, when i tried to open it again this came up.