With a TestCase containing a REST Step and Groovy Script Step.
(The REST Step return a picture (Content-Type: image/png))
The Groovy script use rawResponseData :
testRunner.testCase.testSteps['firstTest'].testRequest.response.rawResponseData is allways null.
The test case works fine, but in a LoadTest rawResponseData is allways null.
SoapUI 5.0.0 and 5.2.1
initial topic : http://community.smartbear.com/t5/SoapUI-Open-Source/rawResponseData-is-null-in-a-LoadTest/td-p/109715