L2VPN Create Failure: Payload Used:{ "ietf-l2vpn-ntw:vpn-service": {  "vpn-id": "l2nm-vpn-o-sr-mpls-2401",  "ietf-l2vpn-ntw-cisco:control-word": "yes",  "vpn-type": "ietf-vpn-common:vpws",  "vpn-nodes": {   "vpn-node": [    {     "vpn-node-id": "TB3-PE-A",     "ietf-l2vpn-ntw-cisco:te-service-mapping": {      "te-mapping": {       "sr-policy": {        "policy": "sr-mpls-policy-a-2401"       }      }     },     "signaling-option": {      "ldp-or-l2tp": {       "pw-peer-list": [        {         "vc-id": 2401,         "peer-addr": "100.100.100.6",         "ietf-l2vpn-ntw-cisco:mpls-label": 241        }       ]      }     },     "vpn-network-accesses": {      "vpn-network-access": [       {        "id": "l2vpn-p2p-ac1",        "interface-id": "GigabitEthernet0/0/0/1",        "service": {         "mtu": 65        },        "connection": {         "encapsulation": {          "encap-type": "ietf-vpn-common:dot1q",          "dot1q": {           "cvlan-id": 601,           "tag-operations": {            "push": [             null            ],            "tag-1": 123,            "ietf-l2vpn-ntw-cisco:mode": "symmetric"           }          }         }        }       }      ]     }    },    {     "vpn-node-id": "TB3-PE-B",     "signaling-option": {      "ldp-or-l2tp": {       "pw-peer-list": [        {         "vc-id": 2401,         "peer-addr": "100.100.100.5",         "ietf-l2vpn-ntw-cisco:mpls-label": 242        }       ]      }     },     "vpn-network-accesses": {      "vpn-network-access": [       {        "id": "l2vpn-p2p-ac1",        "interface-id": "GigabitEthernet0/0/0/1",        "service": {         "mtu": 64        },        "connection": {         "encapsulation": {          "encap-type": "ietf-vpn-common:dot1q",          "dot1q": {           "cvlan-id": 601,           "tag-operations": {            "push": [             null            ],            "tag-1": 234,            "ietf-l2vpn-ntw-cisco:mode": "symmetric"           }          }         }        }       }      ]     }    }   ]  } }}Error:{  "ietf-restconf:errors": {    "error": [      {        "error-type": "application",        "error-tag": "malformed-message",        "error-path": "/ietf-l2vpn-ntw:l2vpn-ntw/vpn-services/vpn-service",        "error-message": "/flat-L2vpn-internal-local-site-service{L2NM-l2nm-vpn-o-sr-mpls-2401-internal TB3-PE-A}: Python cb_validate error. exceptions must derive from BaseException"      }    ]  }}ncs.log:<INFO> 22-Sep-2022::22:05:12.672 nso-10-194-63-180 ncs: ncs progress usid=1315 tid=2476 datastore=running context=rest subsystem=flat_L2vpn_validation validate<INFO> 22-Sep-2022::22:05:12.681 nso-10-194-63-180 ncs: ncs progress usid=1315 tid=2476 datastore=running context=rest subsystem=flat_L2vpn_internal_local_site_validation validate<ERR> 22-Sep-2022::22:05:12.686 nso-10-194-63-180 ncs: devel-c validate error {application, "Python cb_validate error. exceptions must derive from BaseException"} for path /cisco-flat-L2vpn-fp-internal-local-site:flat-L2vpn-internal-local-site-service{L2NM-l2nm-vpn-o-sr-mpls-2401-internal TB3-PE-A}<INFO> 22-Sep-2022::22:05:12.686 nso-10-194-63-180 ncs: ncs progress usid=1315 tid=2476 datastore=running context=rest run validation over the changeset: error (0.023 s)<INFO> 22-Sep-2022::22:05:12.698 nso-10-194-63-180 ncs: ncs delete "/var/opt/ncs/rollbacks/rollback10104.confirm" resulted in enoent<INFO> 22-Sep-2022::22:05:12.698 nso-10-194-63-180 ncs: ncs delete "/var/opt/ncs/rollbacks/rollback10104.confirm.bup" resulted in enoent<INFO> 22-Sep-2022::22:05:12.699 nso-10-194-63-180 ncs: ncs progress usid=1315 tid=2476 datastore=running context=rest releasing transaction lock 
Hi SachinPlease provide us the setup details so that we can look into this error. The payload seems to be working fine for us.Thanks,NikhilHad a call with Sachin and the payload seems to be going through fine now. He'll be trying out a few more times and will update in case of any failures.The payload seems to be going through fine and user was able to provision the service.