Sequence order of CSS00200 message
Summary
Empty
Latest update and next planned activity
Date of latest update
Latest Update
08/11/2024 - The Proposer has withdrawn this issue as it is being progressed under MHHS CR056. The adoption window has now closed. * This is Issue relates to the Market-wide Half Hourly Settlement design.
Impacts Overview
Impacted Consumers
Electricity
Impacted REC Parties and Market Participants
Energy Supplier
Distribution Network Operator
DCC
Impacted REC Documents
Schedule 27 - RMP Lifecycle
Impacted REC Services
Central Switching Service (CSS)
Electricity Retail Data Service (ERDS)
Priority and rationale
Priority last updated on 29 May 2026
Solution development
No documents available.
There is currently no Change Plan.
Original submission
Change details
Madison Leyton - St.Clements
15 Aug 2024
Change details
Sequence order of CSS00200 message
Currently appointment changes can be submitted in a single file (D0205) and therefore generate a single CSS00200 outbound. However, for MHHS, appointments have been separated into separate requests and so each appointment would generate an individual CSS00200. As each CSS00200 message is a refresh of all the current & future dated MS and MDR appointments the ordering the messages are loaded in must be correct. If loaded out of order at CSS the wrong active MS/MDR appointment will be recorded. Currently there is no mechanism for CSS to identify the correct ordering of the messages.
CSS and DSP would hold inaccurate data for MS and MDR appointments.
Two potential solutions have been discussed: 1. Addition of Sequence ID to CSS00200 such that CSS can determine the correct order to load the data in 2. Change design to generate CSS00200 messages in an end of day batch
This would specifically impact Smart MPANs when the MDR and MS are confirmed in the same gate closure batch (same proposed EFD)
Impacts
Electricity
Switching experience
This will affect Consumers with MHHS migrated MPANs only
Schedule 27 - RMP Lifecycle
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No details provided
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No details provided
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Data Item Catalogue, Market Message Catalogue
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No details provided
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Central Switching Service (CSS), Switching Operator, Electricity Retail Data Service
ERDS Service Definition
Other Switching documents may be impacted depending on the solution progressed
Other Switching documents may be impacted depending on the solution progressed
Energy Suppliers, Distribution Network Operators, DCC
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No details provided
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Yes
No details provided
Priority & timing
Yes
DEVELOPMENT - Yes, dependent on MHHS Programme Timelines. Changes are unlikely to be deliverable into SIT Cycle 3 and so another test pathway will likely need to be agreed.
IMPLEMENTATION - Prior to MHHS Go Live or as soon as possible after
IMPLEMENTATION - Prior to MHHS Go Live or as soon as possible after
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MHHS Programme Timelines
No details provided
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Activity
Status has been changed to Issue Withdrawn.