diff --git a/generated/mgcperformancemonitoringhistorydata.go b/generated/mgcperformancemonitoringhistorydata.go
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+/*
+ * Copyright (c) 2018 - present.  Boling Consulting Solutions (bcsw.net)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * NOTE: This file was generated, manual edits will be overwritten!
+ *
+ * Generated by 'goCodeGenerator.py':
+ *              https://github.com/cboling/OMCI-parser/README.md
+ */
+
+package generated
+
+import "github.com/deckarep/golang-set"
+
+// MgcPerformanceMonitoringHistoryDataClassID is the 16-bit ID for the OMCI
+// Managed entity MGC performance monitoring history data
+const MgcPerformanceMonitoringHistoryDataClassID ClassID = ClassID(156)
+
+var mgcperformancemonitoringhistorydataBME *ManagedEntityDefinition
+
+// MgcPerformanceMonitoringHistoryData (class ID #156)
+//	The MGC monitoring data ME provides run-time statistics for an active MGC association. Instances
+//	of this ME are created and deleted by the OLT.
+//
+//	For a complete discussion of generic PM architecture, refer to clause I.4.
+//
+//	Relationships
+//		An instance of this ME is associated with an instance of the MGC config data or MGC config
+//		portal ME.
+//
+//	Attributes
+//		Managed Entity Id
+//			Managed entity ID: This attribute uniquely identifies each instance of this ME. Through an
+//			identical ID, this ME is implicitly linked to an instance of the associated MGC config data or
+//			to the MGC config portal ME. If a non-OMCI configuration method is used for VoIP, there can be
+//			only one live ME instance, associated with the MGC config portal, and with ME ID 0. (R,
+//			setbycreate) (mandatory) (2-bytes)
+//
+//		Interval End Time
+//			Interval end time: This attribute identifies the most recently finished 15-min interval. (R)
+//			(mandatory) (1-byte)
+//
+//		Threshold Data 1_2 Id
+//			Threshold data 1/2 ID: This attribute points to an instance of the threshold data 1 ME that
+//			contains PM threshold values. Since no threshold value attribute number exceeds 7, a threshold
+//			data 2 ME is optional. (R,-W, setbycreate) (mandatory) (2-bytes)
+//
+//		Received Messages
+//			Received messages: This attribute counts the number of received Megaco messages on this
+//			association, as defined by [ITUT H.341]. (R) (mandatory) (4-bytes)
+//
+//		Received Octets
+//			Received octets: This attribute counts the total number of octets received on this association,
+//			as defined by [ITU-T H.341]. (R) (mandatory) (4-bytes)
+//
+//		Sent Messages
+//			Sent messages: This attribute counts the total number of Megaco messages sent over this
+//			association, as defined by [ITU-T H.341]. (R) (mandatory) (4-bytes)
+//
+//		Sent Octets
+//			Sent octets:	This attribute counts the total number of octets sent over this association, as
+//			defined by [ITU-T H.341]. (R) (mandatory) (4-bytes)
+//
+//		Protocol Errors
+//			(R) (mandatory) (4-bytes)
+//
+//		Transport Losses
+//			Transport losses: This attribute counts the total number of transport losses (e.g., socket
+//			problems) detected on this association. A link loss is defined as loss of communication with the
+//			remote entity due to hardware/transient problems, or problems in related software. (R)
+//			(mandatory) (4-bytes)
+//
+//		Last Detected Event
+//			(R) (mandatory) (1-byte)
+//
+//		Last Detected Event Time
+//			Last detected event time: This attribute reports the time in seconds since the last event on
+//			this association was detected, as defined by [ITU-T H.341]. (R) (mandatory) (4-bytes)
+//
+//		Last Detected Reset Time
+//			Last detected reset time: This attribute reports the time in seconds since these statistics were
+//			last reset, as defined by [ITU-T H.341]. Under normal circumstances, a get action on this
+//			attribute would return 900-s to indicate a completed 15-min interval. (R) (mandatory) (4-bytes)
+//
+type MgcPerformanceMonitoringHistoryData struct {
+	ManagedEntityDefinition
+	Attributes AttributeValueMap
+}
+
+func init() {
+	mgcperformancemonitoringhistorydataBME = &ManagedEntityDefinition{
+		Name:    "MgcPerformanceMonitoringHistoryData",
+		ClassID: 156,
+		MessageTypes: mapset.NewSetWith(
+			Create,
+			Delete,
+			Get,
+			Set,
+		),
+		AllowedAttributeMask: 0xffe0,
+		AttributeDefinitions: AttributeDefinitionMap{
+			0:  Uint16Field("ManagedEntityId", PointerAttributeType, 0x0000, 0, mapset.NewSetWith(Read, SetByCreate), false, false, false, 0),
+			1:  ByteField("IntervalEndTime", UnsignedIntegerAttributeType, 0x8000, 0, mapset.NewSetWith(Read), false, false, false, 1),
+			2:  Uint16Field("ThresholdData12Id", UnsignedIntegerAttributeType, 0x4000, 0, mapset.NewSetWith(Read, SetByCreate, Write), false, false, false, 2),
+			3:  Uint32Field("ReceivedMessages", CounterAttributeType, 0x2000, 0, mapset.NewSetWith(Read), false, false, false, 3),
+			4:  Uint32Field("ReceivedOctets", CounterAttributeType, 0x1000, 0, mapset.NewSetWith(Read), false, false, false, 4),
+			5:  Uint32Field("SentMessages", CounterAttributeType, 0x0800, 0, mapset.NewSetWith(Read), false, false, false, 5),
+			6:  Uint32Field("SentOctets", CounterAttributeType, 0x0400, 0, mapset.NewSetWith(Read), false, false, false, 6),
+			7:  Uint32Field("ProtocolErrors", CounterAttributeType, 0x0200, 0, mapset.NewSetWith(Read), false, false, false, 7),
+			8:  Uint32Field("TransportLosses", CounterAttributeType, 0x0100, 0, mapset.NewSetWith(Read), false, false, false, 8),
+			9:  ByteField("LastDetectedEvent", CounterAttributeType, 0x0080, 0, mapset.NewSetWith(Read), false, false, false, 9),
+			10: Uint32Field("LastDetectedEventTime", CounterAttributeType, 0x0040, 0, mapset.NewSetWith(Read), false, false, false, 10),
+			11: Uint32Field("LastDetectedResetTime", CounterAttributeType, 0x0020, 0, mapset.NewSetWith(Read), false, false, false, 11),
+		},
+		Access:  CreatedByOlt,
+		Support: UnknownSupport,
+	}
+}
+
+// NewMgcPerformanceMonitoringHistoryData (class ID 156) creates the basic
+// Managed Entity definition that is used to validate an ME of this type that
+// is received from or transmitted to the OMCC.
+func NewMgcPerformanceMonitoringHistoryData(params ...ParamData) (*ManagedEntity, OmciErrors) {
+	return NewManagedEntity(*mgcperformancemonitoringhistorydataBME, params...)
+}