CRUD error: routing-policy prefix set match

Trying to create a route-policy that includes a prefix-set match . Getting the following error: 

CREATE operation completed

Traceback (most recent call last):

  File "main.py", line 239, in <module>

    rp_cfg = crud_service.create(ne, rp)

  File "/usr/local/lib/python2.7/dist-packages/ydk/services/crud_service.py", line 62, in create

    self._execute_crud_operation_on_provider(provider, entity, 'CREATE', False)

  File "/usr/local/lib/python2.7/dist-packages/ydk/services/crud_service.py", line 168, in _execute_crud_operation_on_provider

    operation 

        error-message: The requested operation failed.

 This is the XML:

 <rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="urn:uuid:f88733e8-346f-49eb-a8c2-57926f607cf6">

  <edit-config>

    <target>

      <candidate/>

    </target>

    <config xmlns:xc="urn:ietf:params:xml:ns:netconf:base:1.0">

      <routing-policy xmlns="http://openconfig.net/yang/routing-policy">

      .....

  </edit-config>

</rpc> 

• The Netconf server is a Cisco IOS XRv Series Cisco IOS XR Software, Version 6.1.2[Default].
• Also, if  the the prefix-set statement is excluded It works just fine. 

the relevant section of the code: 

from ydk.providers import NetconfServiceProvider

import logging

from ydk.services import CRUDService

from ydk.models.openconfig.openconfig_routing_policy import RoutingPolicy

from ydk.models.openconfig import openconfig_bgp

from ydk.models.openconfig import openconfig_interfaces

from ydk.models.openconfig import openconfig_policy_types

from ydk.types import Empty 

host = "10.10.10.1"

port = "22"

username = "user"

password = "pass"

proto = "ssh" 

print('Establishing connection with device %s:%s using %s :'%(host, port, proto)) 

ne = NetconfServiceProvider(address=host,

                            port=port,

                            username=username,

                            password=password,

                            protocol=proto) 

crud_service = CRUDService() 

rp = RoutingPolicy()

p_d = rp.PolicyDefinitions.PolicyDefinition()

p_d.name = "Politicas" 

st = p_d.Statements.Statement()

st.name = "Black Hole" 

bgp_conditions = st.conditions.bgp_conditions

match_community_set = bgp_conditions.MatchCommunitySet()

match_community_set.community_set = "blackHoleCli" 

match_set_options = openconfig_policy_types.MatchSetOptionsTypeEnum.ANY

match_community_set.match_set_options = match_set_options

bgp_conditions.match_community_set = match_community_set 

st.actions.bgp_actions.set_next_hop = "192.0.2.1"

st.actions.accept_route = Empty()

p_d.statements.statement.append(st) 

st2 = p_d.Statements.Statement()

st2.name = "Prefix Set"

match_prefix_set = st2.conditions.MatchPrefixSet()

match_prefix_set.prefix_set = "int_BH"

match_set_options = openconfig_policy_types.MatchSetOptionsRestrictedTypeEnum.ANY

match_prefix_set.match_set_options = match_set_options

st2.conditions.match_prefix_set = match_prefix_set

p_d.statements.statement.append(st2) 

st1 = p_d.Statements.Statement()

st1.name = "reject route"

st1.actions.reject_route = Empty()

p_d.statements.statement.append(st1) 

rp.policy_definitions.policy_definition.append(p_d)

rp_cfg = crud_service.create(ne, rp) 

ne.close()

exit() 

Also, in the router's syslog you can see this message: 

RP/0/0/CPU0:Mar  1 19:36:48.606 : netconf[1111]: TRC: NC: adding http://openconfig.net/yang/bgp-policy to namespace hashmap

RP/0/0/CPU0:Mar  1 19:36:48.606 : netconf[1111]: TRC: NC: Tag <set-next-hop> data len: 9

RP/0/0/CPU0:Mar  1 19:36:48.606 : netconf[1111]: TRC: NC: Element <set-next-hop> is not outer-most element under <filter>, state is unchanged.

......

RP/0/0/CPU0:Mar  1 19:36:48.616 : netconf[1111]: TRC: NC: Parsed the incoming message

RP/0/0/CPU0:Mar  1 19:36:48.616 : netconf[1111]: TRC: NC: No NC SM YFW request in progress right now, calling nc_sm_request_process to process this request.

RP/0/0/CPU0:Mar  1 19:36:48.616 : netconf[1111]: ERR: YFW: ctx=1200a8bc,Failed to map open config model ('YANG framework' detected the 'fatal' condition 'Invalid argument')

Noticed that when request get-configuration from the device via ncclient, the xml output doesnt contain the action specification RoutingPolicy.PolicyDefinitions.PolicyDefinition.Statements.Statement.Actions at all, even though we have it configured on the box and CLI displays it. Also the script is pushing it to device (that can verified from your xml output above)

It shows though the bgp_actions ->next_hop action and that works OK because as you verified, when we remove the prefix-set match we don't have error.