Stacking is not being recognized by Photomatix

[enrique.leopard]

in a collection I  group all exposure Bracketing into a Stacks.  Then sellect all images > File >  Plug-in Extras > Batch Photomatix HDR.  In photomatix I Select: "Grouped into Stacks - Merge the photos in each Stack to HDR"    Then I get a message:

" No Stacks Selected 

The batch couldn't proceed as none of the photos you selected are grouped into Stacks."

It is like Stacking in collection are not being recognized.

[johnrellis]

"It is like Stacking in collection are not being recognized."

That's exactly right. Adobe never updated the Lightroom Software Develop Kit (SDK) for plugins after it "enhanced" LR to support stacks in collections, and plugins can't see collection stacks. The stacking design is weird -- you can only stack photos from the same folder or collection.