What method are you using to load the separate groups in Poser? 
 

You could test to see if it’s possible to bring any of the morph groups into Poser as an obj. import. This will determine if the objs. are acceptable in any form. Sometimes Poser decides it doesn't like a particular obj. for some reason. 

If the morph objs. will not load as objs. try exporting them from Zbrush again, and if that doesn't work, load and save the objs in some other modeler program if possible.

 

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