Market Notices

Change Number: CHG0109281

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Declared Wholesale Gas Market
Change Title: Planned System Maintenance - Declared Wholesale Gas Market (DWGM) Production

Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.

AEMO ELECTRICITY MARKET NOTICE.

Non-credible contingency event - QLD region - 6/05/2026

At 1239 hrs the Townsville South No. 2 132 kV Bus tripped.

AEMO did not instruct load shedding.

AEMO has not been advised of any disconnection of bulk electrical load.

The cause of this non credible contingency event has been identified and AEMO is satisfied that another occurrence of this event is unlikely under the current circumstances.

AEMO will not reclassify this event as a credible contingency event.


Manager NEM Real Time Operations

Change Number: CHG0110288

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MSATS - Market Settlement & Transfer System
Change Title: MSATS 56.2 BAU and PMS Release
Change Start Date & Time: 10/05/2026 10:00:00
Change End Date & Time: 10/05/2026 14:00:00
Outage Start Date & Time: 10/05/2026 10:00:00
Outage End Date & Time: 10/05/2026 14:00:00
Environment: Production
Participant Impact and Requirements: Users will not be able to access MSATS during the outage period.

Meter data processing and RM reports will not be available during the outage period.

User Rights Management (URM) will continue to operate, however the administration screens will not be accessible.

MSATS B2B/B2M Transactions and B2B MSATS Screens will be unavailable during this outage

NMI Discovery will not be available during the outage period.

Network Outage Scheduler (NOS) B2B Transactions submitted via FTP will not be processed during this outage period. The NOS application will still be available.

CDR and CDP will not be available during the outage period.

Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.

Change Number: CHG0109281

Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Declared Wholesale Gas Market
Change Title: Planned System Maintenance - Declared Wholesale Gas Market (DWGM) Production

Change Start Date & Time: 05/05/2026 08:00:00
Change End Date & Time: 06/05/2026 18:00:00
Outage Start Date & Time: 05/05/2026 22:20:00
Outage End Date & Time: 06/05/2026 04:00:00
Environment: Production

Participant Impact and Requirements: Dear User,
Please be aware of a DWGM market system outage due to a planned server migration in the Production environment.

The following impacts are expected during the maintenance activities:

DWGM interfaces Web Exchanger, Web Services, DWGM CC Auction and Prudential Dashboard, will either be unavailable or have intermittent availability during the outage window.

Participants should not assume that any submissions made during the outage window will be successful or retained. If submissions are attempted and successful, participants should review them or resubmit after AEMO notifies that maintenance has ended. This only applies to submissions attempted during the maintenance, any submissions prior to the outage start time will not be impacted.
MIBB will be available to retrieve reports generated prior to the outage.

Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.

Change Number: CHG0110369

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Consumer Administration and Transfer Solution(CATS)_PreProd
Change Title: MSATS 57.0 Flexiable Trading Arrangement (FTA Release 1)


Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.

Change Number: CHG0108549

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Market Settlement & Transfer System
Change Title: eMDM April Maintenance Release

Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.

Change Number: CHG0110447

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Local Area Network
Change Title: Planned maintenance to Cisco ISE Servers
Change Start Date & Time: 30/04/2026 10:00:00
Change End Date & Time: 30/04/2026 18:00:00
Outage Start Date & Time: 30/04/2026 12:00:00
Outage End Date & Time: 30/04/2026 18:00:00
Environment: Production
Participant Impact and Requirements: The following impacts are expected to participant connectivity during this planned outage:

IPWAN Participants - No impact is expected

Lan-2-Lan VPN Participants (IPSEC) - No impact is expected

B2B VPN - No impact is expected.

SSL VPN Participants: There may be a delay in authenticating to the SSL VPN however existing connections should not be impacted.

GASHUB: No impact is expected.

Any other expected impacts, in addition to those listed above, will be communicated in advance.

Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.

Change Number: CHG0110369

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MSATS - Consumer Administration and Transfer Solution(CATS)_PreProd
Change Title: MSATS 57.0 Flexiable Trading Arrangement (FTA Release 1)

Change Start Date & Time: 28/04/2026 13:00:00
Change End Date & Time: 28/04/2026 17:00:00
Outage Start Date & Time: 28/04/2026 13:00:00
Outage End Date & Time: 28/04/2026 17:00:00
Environment: Pre-Production
Participant Impact and Requirements: Users will not be able to access MSATS during the outage period.

Meter data processing and RM reports will not be available during the outage period.

User Rights Management (URM) will continue to operate, however the administration screens will not be accessible.

MSATS B2B/B2M Transactions and B2B MSATS Screens will be unavailable during this outage

NMI Discovery will not be available during the outage period.

CDR and CDP will not be available during the outage period

Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.

Change Number: CHG0110362

Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Consumer Administration and Transfer Solution(CATS)_PreProd
Change Title: Pre-Prod MSATS 56.2 Maintenance Patch Release

Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.