[Home](./index.md) > [@contract-case/case-boundary](./case-boundary.md) > [BoundaryFailureKindConstants](./case-boundary.boundaryfailurekindconstants.md) > [CASE_TRIGGER_ERROR](./case-boundary.boundaryfailurekindconstants.case_trigger_error.md) ## BoundaryFailureKindConstants.CASE_TRIGGER_ERROR property The user-provided trigger failed when it was not expected to do so **Signature:** ```typescript static readonly CASE_TRIGGER_ERROR: string; ```