IT change and release management
This page lists schedules for IT changes and releases across AEMO’s electricity and gas market systems. All change management is governed under the IT Change Management Policy and Procedure.
IT changes
AEMO’s IT change schedule informs AEMO participants in advance about IT changes and provides a consolidated view of the changes planned. This is another step towards standardising the maintenance and outage windows for AEMO’s market-facing systems, helping to better manage any impact as well as overall planning of changes and releases.
Forward schedule of IT changes
The fortnightly forward schedule of IT changes lists all planned maintenance, as well as the status history of each of AEMO’s business services.
Outage and maintenance windows
The IT outage and maintenance windows (change windows) for major system changes outline specific timeframes when IT changes will occur.
Market Systems User Group (MSUG) Meeting
Technical Specifications
Release schedules for AEMO markets and systems.
National Electricity Market (NEM)
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Market Settlement and Transfer Solution (MSATS)
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16/08/2022
MSDR Data Transition Table v2.00
50.54 KB -
01/08/2022
MSATS 48.0 - Technical Specification - November 2022
1.96 MB -
18/08/2022
MSATS 47.2 - Technical Specification - August 2022
1.66 MB -
08/06/2022
MSATS 47.10 - Technical Specification - May 2022
856.99 KB -
31/01/2022
MSATS 47.10 Technical Specification
2.66 MB -
14/10/2021
MSATS 47.0 - Technical Specification - November 2021
1.29 MB -
29/09/2021
MSATS 47.0 - Technical Specification - November 2021 - Comparison
1.33 MB -
08/09/2021
MSATS 46.99 Technical Specification
1.78 MB -
01/09/2021
MSATS 46.98 Technical Specification
4.34 MB
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Energy Market Management System (EMMS)
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29/07/2022
Change Specification - Ancillary Service Loads - August 2022
747.75 KB -
26/04/2022
EMMS Release Schedule - Data Interchange - May 2022
674.33 KB -
14/12/2021
EMMS - Data Interchange - Log4J2 vulnerability
130.05 KB -
01/12/2021
EMMS - MMS Data Model - VOLTAGE_INSTRUCTION Table
75.04 KB -
03/12/2021
EMMS Release Schedule and Technical Specification - December 2021
1.44 MB -
22/11/2021
EMMS Release Schedule and Technical Specification - October 2021
1.6 MB -
26/03/2021
EMMS - MMS Data Model - GENUNITS_UNIT Table
77.68 KB -
10/05/2021
EMMS Release FAQ - October 2020 - Data Model v5.00
1.07 MB -
03/03/2021
EMMS Technical Specification - 5MS - Data Model v5.00
1.6 MB -
11/11/2020
EMMS Technical Specification - 5MS - Dispatch and Operations v6.0
1.16 MB -
15/10/2020
EMMS Technical Specification - 5MS - Settlements v4.02
1.38 MB -
13/05/2020
EMMS Technical Specification - 5MS - Prudentials
1.01 MB -
08/01/2020
EMMS Release Schedule - Data Interchange - February 2020
412.24 KB -
14/10/2019
EMMS Technical Specification 5MS Reallocations December 2019
1.75 MB -
31/07/2019
Draft EMMS release schedule and technical specification – 5MS reallocations
908.81 KB -
16/08/2019
EMMS release schedule and technical specification – SRA – October 2019
1.8 MB -
20/06/2018
EMMS Release Schedule - August 2018 - Market Participant Self Forecast
890.01 KB
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Wholesale Electricity Market (WEM)
Environments
The table below details the release and build which is currently running in each environment. The snapshot date indicates the date at which the last snapshot of Production market data was taken for the environment, as applicable.
| Environment | Version | Snapshot date | Link |
|---|---|---|---|
| Production | WEMS 3.45 (Build 3.45-1552-3); RCM 1.27 (Build 1.27-3028-3); WEM PaSS 2.0 (Build 2.0-814-2) |
https://wems.aemo.com.au/ | |
| Market Trial | WEMS 3.45 (Build 3.45-1552-3); RCM 1.27 (Build 1.27-3028-3); WEM PaSS 2.0 (Build 2.0-814-2) | 09/03/2022 | https://wems-mkt.aemo.com.au/ |
Market Trial environments can simulate the operation of the WEM, but actual market outcomes may vary in these environments due to testing activities of Market Participants and AEMO, differences in software versions, and the time since the last snapshot.
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Releases (2022-2021)
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Releases (2021-2020)
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24/11/2021
WEMS 3.44 and WEM PaSS 1.9 patch Release Notes
406.88 KB -
09/11/2021
RCM 1.24 Release Notes
1.05 MB -
24/11/2021
WEM PaSS 1.9 WEMS 3.43 and RCM 1.23 Release Notes
399.94 KB -
24/11/2021
WEM PaSS 1.8 WEMS 3.42 and RCM 1.22 Release Notes
1.27 MB -
16/07/2021
WEM PaSS 1.7 WEMS 3.40 and RCM 1.21 Release Notes
1.01 MB -
24/06/2021
GPS System 1.0 and WEMS 3.41 Release Notes
519.27 KB -
24/06/2021
WEMS 3.39 and RCM 1.20 Release Notes
708.42 KB -
24/11/2021
WEMS 3.38 and Prudential 1.6 Release Notes
275.44 KB -
18/02/2021
WEMS Prudential Service 1.5 Release Notes
374.79 KB -
25/11/2020
WEMS 3.37 and RCM 1.19 Release Notes
327.44 KB -
28/09/2020
RCM 1.18 Release Notes
331.19 KB -
26/08/2020
WEMS 3.36 Release Notes
392.5 KB -
18/08/2020
WEMS Prudential Services 1.4 Release Notes
945.2 KB -
22/06/2020
WEMS Prudential Services 1.3 Release Notes
669.81 KB -
28/04/2020
WEMS 3.35 Release Notes
437.96 KB -
15/01/2020
WEMS 3.34 and RCM 1.14 Release Notes
465.47 KB
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Releases (2019-2018)
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03/10/2019
WEMS 3.33 and RCM 1.13 Release Notes
415.1 KB -
24/06/2019
WEMS 3.32 and RCM 1.12 Release Notes
463.04 KB -
07/06/2019
WEMS 3.31 Release Notes
411.17 KB -
25/03/2019
WEMS 3.30 and RCM 1.11 Release Notes
698.28 KB -
18/03/2019
WEMS 3.29 Release Notes
321.89 KB -
13/11/2018
WEMS 3.28 and RCM 1.10 Release Notes
811.84 KB -
17/09/2018
WEMS 3.27 and RCM 1.9 Release Notes
784.12 KB -
05/06/2018
RCM 1.8 Release Notes
753.95 KB -
07/05/2018
WEMS 3.26 and RCM 1.7 Release Notes
620.11 KB -
29/03/2018
WEMS 3.25 and RCM 1.6 Release Notes
992.08 KB -
02/02/2018
WEMS 3.24 and RCM 1.5 Release Notes
584.07 KB
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Releases (2017-2016)
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13/11/2017
WEMS 3.23 and RCM 1.4 Release Notes
675.62 KB -
09/10/2017
WEMS 3.22 and RCM 1.3 Release Notes
575.32 KB -
29/09/2017
WEMS 3.22 and RCM 1.2 Release Notes
863.93 KB -
23/08/2017
WEMS 3.21 and RCM 1.1 Release Notes
653.37 KB -
11/07/2017
WEMS 3.21 Release Notes
1004.67 KB -
16/05/2017
WEMS 3.19 Patch 1 Release Notes
268.48 KB -
12/04/2017
WEMS 3.19 Release Notes
649.86 KB -
28/09/2016
WEMS 3.18 Release Notes
298.03 KB -
04/08/2016
WEMS 3.17 Release Notes
432.27 KB -
25/07/2016
WEMS 3.16 Release Notes
535.04 KB -
08/07/2016
WEMS 3.14 Release Notes
500.93 KB -
08/07/2016
WEMS 3.13.1 Release Notes
1.32 MB
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Releases (2015-2014)
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23/11/2015
WEMS 3.13 Release Notes
861.65 KB -
13/10/2015
WEMS 3.12 Patch 1 Release Notes
522.65 KB -
21/09/2015
WEMS 3.12 Release Notes
1.18 MB -
10/07/2015
WEMS 3.11 Patch 4 Release Notes
426.46 KB -
14/04/2015
WEMS 3.11 Patch 3 Release Notes
774.52 KB -
06/03/2015
WEMS 3.11 Patch 2 Release Notes
771.54 KB -
19/01/2015
WEMS 3.11 Patch 1 Release Notes
778.8 KB -
10/12/2014
WEMS 3.11 Release Notes
1.07 MB -
08/08/2014
WEMS 3.10 Patch 1 Release Notes
601.54 KB -
11/06/2014
WEMS 3.10 Release Notes
888.45 KB
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Gas markets and systems
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Gas Bulletin Board (GBB)
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WA Gas Bulletin Board (WA GBB)
Release notes
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15/09/2021
GBB 1.17 Release Notes
322.44 KB -
17/11/2020
GBB 1.16 Release Notes
364.97 KB -
17/06/2020
GBB 1.15 Release Notes
253.96 KB -
19/02/2020
GBB 1.14 Release Notes
525.45 KB -
28/08/2019
GBB 1.13 Release Notes
300.11 KB -
17/04/2019
GBB 1.12 Release Notes
315 KB -
19/09/2018
GBB 1.11 Release Notes
633.16 KB -
16/05/2018
GBB 1.10 Release Notes
282.33 KB -
15/11/2017
GBB 1.9 Release Notes
652.75 KB -
07/11/2016
GBB 1.8 Release Notes
300.28 KB -
15/06/2016
GBB 1.7 Release Notes
286.42 KB -
30/03/2016
GBB 1.6.1 Release Notes
1.43 MB -
29/11/2015
GBB 1.6 AEMO Patch Release Notes
926.74 KB -
23/10/2015
GBB 1.5 Patch 1 Release Notes
503.1 KB -
21/10/2015
GBB 1.5 Release Notes
725.43 KB
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Declared Wholesale Gas Market (DWGM)
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Short Term Trading Market (STTM)
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Gas Supply Hub (GSH)
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Pipeline Capacity Trading (PCT)
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Gas Full Retail Contestability (FRC)