API Reference > imodeljs-backend > iModels > TxnManager > beginMultiTxnOperation beginMultiTxnOperation Method Begin a new multi-Txn operation. This can be used to cause a series of Txns, that would normally be considered separate actions for undo, to be grouped into a single undoable operation. This means that when reverseTxns(1) is called, the entire group of changes are undone together. Multi-Txn operations can be nested, and until the outermost operation is closed, all changes constitute a single operation. beginMultiTxnOperation(): DbResult note This method must always be paired with a call to endMultiTxnAction. Returns - DbResult Defined in core/backend/src/IModelDb.ts Line 2237 Last Updated: 13 June, 2024