[Home](./index.md) > [@contract-case/case-boundary](./case-boundary.md) > [IResultPrinter](./case-boundary.iresultprinter.md) > [printMessageError](./case-boundary.iresultprinter.printmessageerror.md) ## IResultPrinter.printMessageError() method Called by ContractCase to ask the DSL to print an error during testing that doesn't have an expected / actual value **Signature:** ```typescript printMessageError(messageErrorDetails: PrintableMessageError): Promise; ``` ## Parameters | Parameter | Type | Description | | ------------------- | ----------------------------------------------------------------- | ----------- | | messageErrorDetails | [PrintableMessageError](./case-boundary.printablemessageerror.md) | | **Returns:** Promise<[BoundaryResult](./case-boundary.boundaryresult.md)>