stride3d/stride · error · InvalidOperationException

Trying to complete a selection transaction but no…

Error message

Trying to complete a selection transaction but no transaction in progress

What it means

CompleteTransaction is the private commit step of a selection transaction; it throws InvalidOperationException when currentTransaction is null, meaning something asked to complete a transaction that was never begun or was already completed.

Solutions

Ensure BeginTransaction is called exactly once per CompleteTransaction
Guard the completion path (check currentTransaction != null) or make complete idempotent
Track transaction state so teardown cannot complete an already-finished transaction

Example fix

// before
private void CompleteTransaction()
{
    var newState = new SelectionState();
// after
private void CompleteTransaction()
{
    if (currentTransaction == null) return; // nothing to complete
    var newState = new SelectionState();

Defensive patterns

Strategy: try-catch

Validate before calling

if (currentTransaction == null) return; // no active transaction to complete

Type guard

bool HasActiveTransaction => currentTransaction != null;

Try / catch

try { CompleteTransaction(); } catch (InvalidOperationException ex) when (ex.Message.Contains("no transaction in progress")) { /* tolerate double-complete during teardown */ }

Prevention

Pair Begin/CompleteTransaction strictly in begin/finally blocks
Add a transaction-depth counter to prevent nested or double completion
Cancel (rather than complete) on exception paths that abort the transaction

When it happens

Trigger: Calling the completion path with no BeginTransaction — e.g. transaction already completed (double completion), an exception during the transaction skipped the begin, or nested completion after the current transaction was closed.

Common situations: Re-entrant selection updates completing the same transaction twice; exception in the middle of a transaction followed by a finally/complete call; UI events firing after the transaction ended.

Understand the failure class

Background: "Invalid state transition" errors: "status must be X, actually Y", "already rejected/charging/uninstalled", "cannot ... while running" — what they mean when a library rejects your call — this error's family across 31 libraries.

Related errors

AI-assisted analysis of stride3d/stride@96fad776d2 (2026-09-14). Data as JSON: /api/errors/0138f700a5f6e5ca. Report an issue: GitHub.

Appendix: source

Thrown at sources/editor/Stride.Core.Assets.Editor/Services/SelectionService.cs:197

                    {
                        foreach (var collection in scope.Collections)
                        {
                            var descriptor = TypeDescriptorFactory.Default.Find(collection.GetType()) as CollectionDescriptor;
                            descriptor?.Clear(collection);
                        }
                    }
                }
                finally
                {
                    PropertySelectionSuppressed = false;
                }
            }
        }

        private void CompleteTransaction()
        {
            if (currentTransaction == null)
                throw new InvalidOperationException("Trying to complete a selection transaction but no transaction in progress");

            var newState = new SelectionState();
            newState.SaveStates(scopes);

            currentTransaction.Continue();
            stack.PushOperation(new SelectionOperation(this, CurrentState, newState));
            currentTransaction.Complete();
            currentTransaction = null;

            CurrentState = newState;
        }
    }
}

View on GitHub (pinned to 96fad776d2)