Import a Rumba Animation in Maya
Import a Rumba animation back into Maya, over existing Maya assets using the Rumba animation format.
Prepare a Maya scene assembly
First, make a Maya assembly using references on the assets used in the Rumba animation. The reference prefixes must match the Asset nodes used in Rumba :

The Rumba assembly, using Asset nodes.

The Maya assembly, using references and prefixes.
Import the Rumba animation
Press the Import Rumba Animation button on the Rumba shelf, and select your rumba project.
This command exports a temporary .rumbaanim file and applies it to your selected controllers, or on all the controllers if nothing is selected.
You can also directly import a previously exported .rumbaanim file.
You can script all this, see Import a .rumba or a .rumbaanim file back into Maya.
Warning
The Rumba deformation tools (like the sculpt or the sticky deformer) won’t be exported using that workflow.