3831003 - Error message: FINS_ACDOC_DB007 — “External document numbers starting with character ‘G’ are internally used by SAP - SAP S/4HANA Cloud Public Edition

• Error occurs when releasing SD billing documents to accounting.
• Error message: FINS_ACDOC_DB007 — “External document numbers starting with character ‘G’ are internally used by SAP.”
• The accounting document number generated during release starts with “G”; the system rejects the posting.

SAP S/4HANA Cloud Public Edition

Try to maintain number range starting with B, C, D, M, P, R, S, G or T as a starting character.

• External document numbers starting with ‘G’ are reserved for postings to technical ledgers (for example, profit center valuation, actual costing).
• This reservation was introduced with the technical ledger in 2020 so it is not allowed. Use different character.

The English alphabetical letters B, C, D, M, P, R, S, G and T are by default reserved by SAP for the technical documents which are to be created during S/4 HANA financial data migration and other FI processes.

During the execution of different FI processes ( eg: the migration or the first posting ) the system checks table BKPF to identify if any of these letters are already used, if BKPF does not contain any document starting with these letters then the default letters are reserved if not then next available letter is reserved.

So the entry of table FINS_BELNR_NR can be different in different clients based the documents with external number ranges in BKPF.

List of all Reserved Characters

• B    Balance Carry Forward Line items
• C    Migration of Line items
• D    Migration of Balances
• S    Simulation
• M    Migration of Material Ledger
• R    Historical Data for Event Based Revenue Recognition
• P    Predictive
• T    Statistical / Estimated Costs
• G    Technical Ledgers

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