# Request for master data change from the MSB to NB (responsible) — NB view ## Process flow from the perspective of the NB \nSystem diagram: Anfrage zur Stammdatenänderung vom MSB an NB (verantwortlich) — view of NB\n\n\nCustomer backend system\n\nMACO APP · NB\n\nMarket partner\n\n\n\n1. Anfrage an NB von MSB\n\nMSB\n\nAS4\n44140\n\nLoad data for the incoming\ncheck\n\n\n2 read APIs called\n\nAPI\nlisted at the step\n\nAPERAK check: Z33\n\n\nCreate transaction\n\n\nCreate process data\n\nAPI\n\nEBD check: G_0069\nAntwort auf Anfrage\n\n\nTrigger follow-up process:\n44117\n\n\nTriggered by incoming\nmessage: 44139\n\n\nLoad data for processing\n\n\n3 read APIs called\n\nAPI\nlisted at the step\n\n2. Antwort auf Anfrage an NB\nvon MSB\n\n\nMSB\n\nAS4\n44142\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\nTriggered by incoming\nmessage: 44140\n\n\nProcess trigger received\n\n\nSTART_ANFRAGE_STAMMDA\nTENAENDERUNG…\n\nAPI\n\n3. Ggf. Änderung vom NB an\nLF\n\n\nLF\n\nAS4\n44117, 44160\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n4. Antwort auf Änderung vom\nNB an LF\n\n\nLF\n\nAS4\n44119, 44161\n\nAPERAK check: Z33\n\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Anfrage zur Stammdatenänderung vom MSB an NB (verantwortlich) — view of NB\n\n\nBackend (customer)\n\n\nMACO APP · NB\n\n\nMSB\n\n\nLF\n\n\n1. Anfrage an NB von MSB\nAS4 · PI 44140\n\nCreate transaction\nCreate process data\n\n2. Antwort auf Anfrage an NB von MSB\nAS4 · PI 44142 · E_3026\nE_3026 — Anfrage zur Stammdatenänderung prüfen\n\nUpdate transaction\nUpdate process data\n\nSTART_ANFRAGE_STAMMDATENAENDERUNG_GAS\nTrigger event\n\n3. Ggf. Änderung vom NB an LF\nAS4 · PI 44117, 44160\n\nUpdate transaction\nUpdate process data\n\n4. Antwort auf Änderung vom NB an LF\nAS4 · PI 44119, 44161 · E_3027\nE_3027 — Änderung vom NB prüfen\n\nUpdate transaction\nUpdate process data\n"} titel="NB" /> ## Process steps ### Request to NB from MSB
**Check identifiers** - [44140](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44140) — Not bal.-rel. request to NB · AS4
**Flow**
  1. Message from **MSB** · AS4
  2. **Load data for the incoming check** - [Read market location](/en/api/202604/backend-lesen/getmarketlocationbasic#marktlokation-lesen) `GET /getMarketLocationBasic` Try it - [Read metering location](/en/api/202604/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it
  3. **APERAK checks** - `44140` → `Z33`
  4. **Write endpoint** - Transaction created — [Create process data](/en/api/202604/backend-schreiben-nb/createprocessdata#prozessdaten-erstellen) `POST /createProcessData` Try it out Creates a new transaction in the backend with the data of the incoming message.
  5. **Decision tree** - `44140` → `G_0069` — Response to request
  6. **Trigger follow-up process** - [44117](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44117) — Change from MSB with dependencies After processing, the MACO APP starts this follow-up process itself.
### Response to request to NB from MSB
**Check identifiers** - [44142](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44142) — Response to request · AS4
**Flow**
  1. **Triggered by incoming message** - [44139](/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44139) The MACO APP sends this message itself, as a follow-up process after this incoming message.
  2. **Load data for processing** - [Read market location](/en/api/202604/backend-lesen/getmarketlocationbasic#marktlokation-lesen) `GET /getMarketLocationBasic` Try it - [Read metering location](/en/api/202604/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it - [Read grid usage contract](/en/api/202604/backend-lesen/getgridusagecontractbasic#netznutzungsvertrag-lesen) `GET /getGridUsageContractBasic` Try it
  3. Message to **MSB** · AS4
    **Response per decision tree** - `44142` → [E_3026](/en/referenz/202604/ebd/E_3026) · Check request for master data change
  4. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-nb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Change from NB to LF, if applicable
**Check identifiers** - [44117](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44117) — Change from MSB with dependencies · AS4 - [44160](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44160) — Change from MSB without dependencies · AS4
**Flow**
  1. **Triggered by incoming message** - [44140](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44140) — Not bal.-rel. request to NB The MACO APP sends this message itself, as a follow-up process after this incoming message. In addition, the backend can trigger this step with an event — the next item.
  2. **Prozessauslöser** [`START_ANFRAGE_STAMMDATENAENDERUNG_GAS`](/en/api/202604/ausloeser-nb/start-anfrage-stammdatenaenderung-gas) \",\n \"gewerbekennzeichnung\": \"\",\n \"name1\": \"\",\n \"name2\": \"\",\n \"name3\": \"\",\n \"name4\": \"\",\n \"partneradresse\": \"\"\n },\n \"hausverwalter\": {\n \"anrede\": \"\",\n \"gewerbekennzeichnung\": \"\",\n \"name1\": \"\",\n \"name2\": \"\",\n \"name3\": \"\",\n \"name4\": \"\",\n \"partneradresse\": \"\"\n },\n \"marktlokationsId\": \"\"\n }\n ],\n \"MESSLOKATION\": [\n {\n \"gasqualitaet\": \"\",\n \"marktrollen\": [\n \"\"\n ],\n \"messlokationsId\": \"\"\n }\n ],\n \"MESSSTELLENBETRIEBSVERTRAG\": [\n {\n \"lokationsId\": \"\",\n \"lokationsTyp\": \"\",\n \"vertragskonditionen\": {\n \"geplanteTurnusablesung\": \"\"\n }\n }\n ],\n \"NETZNUTZUNGSVERTRAG\": [\n {\n \"korrespondenzpartner\": {\n \"anrede\": \"\",\n \"gewerbekennzeichnung\": \"\",\n \"name1\": \"\",\n \"name2\": \"\",\n \"name3\": \"\",\n \"name4\": \"\",\n \"partneradresse\": \"\"\n },\n \"vertragsbeginn\": \"\",\n \"vertragspartner2\": [\n \"\"\n ]\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"rollencodenummer\": \"\"\n },\n \"gueltigAb\": \"\",\n \"kategorie\": \"\",\n \"sparte\": \"\",\n \"transaktionsgrund\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_ANFRAGE_STAMMDATENAENDERUNG\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  3. Message to **LF** · AS4
  4. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-nb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Response to change from the NB to LF
**Check identifiers** - [44119](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44119) — Response to change from MSB · AS4 - [44161](/en/schnittstellen/202604/pruefi/UTILMD_GAS/PI_44161) — Response to change · AS4
**Flow**
  1. Message from **LF** · AS4
    **Response per decision tree** - `44119`, `44161` → [E_3027](/en/referenz/202604/ebd/E_3027) · Check change from the NB
  2. **APERAK checks** - `44119`, `44161` → `Z33`
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-nb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend with the data of the incoming message.
Decision trees of this process | EBD | Name | |---|---| | [E_3026](/referenz/202604/ebd/E_3026) | Check request for master data change | | [E_3027](/referenz/202604/ebd/E_3027) | Check change from the NB |
## Process information
  1. ### First message **MSB** sends “Request to NB from MSB” (step 1). From here on, it is the turn of the party involved on this page.
## Other views of the process The same process through the eyes of the other parties involved: the same steps, each read from their point of view. - [View LF](/en/prozessdoku/202604/LF/geli-gas-2-0-anfrage-zur-stammdatenanderung-vom-msb-an-nb-verantwortlich) — LF - [View MSB](/en/prozessdoku/202604/MSB/geli-gas-2-0-anfrage-zur-stammdatenanderung-vom-msb-an-nb-verantwortlich) — MSB *The source provides no use case profile for this process — objective, precondition and result are not recorded there.* *The steps are the **possible** messages of this process, not a sequence — the source lists neither conditions nor alternatives. The small box on the step names the own view on the left: with **←** it receives, with **→** it sends. Collapsed steps run between other market partners.* :::caution{title="Step sequence reconstructed"} For this process, the BNetzA consolidated version carries no sequence diagram. The steps are reconstructed from the BDEW check identifier table: grouped by the designation, ordered by the process step. The method agrees with the consolidated version in 200 of 200 cases that can be cross-checked — the individual line is nevertheless not editorially reviewed. Check it against the rulebook before adopting it into an implementation specification. :::