Unable to add host to Distributed Virtual Switch

Hi,

I'm trying to add a host to a distributed virtual switch through the API (ReconfigureDvs_Task).

I'm setting the following:

VMWareDVSConfigSpec - configVersion, host

DistributedVirtualSwitchHostMemberConfigSpec - operation, host, backing

DistributedVirtualSwitchHostMemberPnicBacking - pnicSpec

DistributedVirtualSwitchHostMemberPnicSpec - pnicDevice

Reconfigre_DvsTask fails with the following error in vcenter:

An error occurred during host configuration. got (vim.fault.PlatformConfigFault) exception

Also the VCenter logs have the following information about this error:

[04244 error 'utilshostMethod'] [HostMethodDispatcher::ProcessTaskResult] Host call [createDistributedVirtualSwitch]for host [host-***] failed with exception [vim.fault.PlatformConfigFault]

[03856 error 'operationhostOp' opID=a0963b99] [MoDVSwitch::SendHostMemberChangeToHostsInParallel] failed in calling host dvs manager (op=add): got [vim.fault.PlatformConfigFault exception:

--> (vim.fault.PlatformConfigFault) {

-->    dynamicType = <unset>,

-->    faultCause = (vmodl.MethodFault) null,

-->    faultMessage = (vmodl.LocalizableMessage) [

-->       (vmodl.LocalizableMessage) {

-->          dynamicType = <unset>,

-->          key = "com.vmware.esx.hostctl.default",

-->          arg = (vmodl.KeyAnyValue) [

-->             (vmodl.KeyAnyValue) {

-->                dynamicType = <unset>,

-->                key = "reason",

-->                value = "Sysinfo error on operation returned status : Busy. Please see the VMkernel log for detailed error information",

-->             }

-->          ],

-->          message = "Operation failed, diagnostics report: Sysinfo error on operation returned status : Busy. Please see the VMkernel log for detailed error information",

-->       }

-->    ],

-->    text = "",

-->    msg = "An error occurred during host configuration."

--> }]

Any help will be greatly appreciated.

Thanks!