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fail(String): Nothing

Throws an exception with the specified message.


Name Description


An error message (String).


This example returns a failure message Data was empty because the expression (sizeOf(myVar) <= 0) is true. A shortened version of the error message is shown in the Output section below.


%dw 2.0
import * from dw::Runtime
var result = []
output application/json
if(sizeOf(result) <= 0) fail('Data was empty') else result


ERROR 2018-07-29 11:47:44,983 ...
Message               : "Data was empty

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