Set StoragePath in VCO during WFStubBuildingMachine

I'm trying to set the storagepath during the WFStubBuildingMachine stub. 

Currently the stub calls VCO where it gets the storage path.

The two things I've tried:

1. Set with VCO via teh iaas plugin.

The option does not seem to set the value. vcacVM.storagepath = 'path';

2. Set the path as a VCO output and assign storagepath in iaas designer.

method used:

machine.storagePath = outStorage;

Where machine is a VirtualMachine type and outstorage is a string assigned via the workflowOutputCollection("storagePath").tostring().

I use this same technique with vmname and it works fine.

The error I'm getting for storage is: In vcac: Request failed: server123 not found, and possibly deleted before provisioning finished.

SO Question:  What approach has been used by someone that works? If I'm on the right track what am I missing? Can you share your code or provide some direction for such a solution?

Thanks!