Creating vSphere docker machine: default resource pool resolves to multiple instances, please specify

I’m attempting to create a machine on vSphere using the following syntax: https://docs.docker.com/machine/drivers/vsphere/

I get the error “default resource pool resolves to multiple instances, please specify”

We use DRS, and my CLI is:
docker-machine create --driver vmwarevsphere --vmwarevsphere-username=MYUSER --vmwarevsphere-password=MYPW --vmwarevsphere-vcenter=MYVCENTER --vmwarevsphere-datacenter=MYDCNAME --vmwarevsphere-datastore=MYDATASTORECLUSTER/MYDATASTORE --vmwarevsphere-network=MYNETWORKNAME

Anyone run into this one?

Thanks,
Jaime

Whoops I go this now: contrary to the documentation, I did have to specify my host server even though I have DRS. All set.