Very new at Blender. If I create groups and save it as obj, the groups are gone when I reopen the obj file in Blender. I tried several import and export settings, including the group button. What part am I missing?

The Blender vertex groups are not exported unless you use the polygroups button in the export dialog. I just discovered this as I tested it for this post - cool.

Another option - you can use material indexes instead, then use the export option button called "Material Groups". It's been a while since I did it but when I built clothing pieces for Poser figures I actually ended up splitting the piece into multiple objects before exporting which was a pain but it worked.

Haven't figured it out yet. Somehow missing something. I have a bit the same, I am thinking of cutting my mesh up. But trying to avoid that. I have one mesh for export to Daz. I cannot attach skeleton, if I don't have groups. The plan was using Blender only for creating the groups, but it surprised me. In the future I will start using Blender. Getting late here, so give it a new try tomorrow.

Attached Link: http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2771316

There were supposed to be changes to 2.49 that added a "poly groups" options to the OBJ exporter (and importer as well I think) to handle this.

Yes, I am using 2.49 and the Polygroups option is there.

I think you need to clarify whether you are trying to save object groups or vertex groups

Think I got it solved. When export and import in Blender, the groups show up now. Group is also exported to Daz. Only activate Keep Vertex Order and Polygroups with export. Thanks.

You might want to check out the tips video at CG Cookie. It could be a big help.

Found it. Thanks. But for now I only need Blender for getting my objects in Daz. Got that covered. Blender looks very good, but is so much different, I need time for that.