groovy logging problems

Hello,

I encounter a strange behaviour in SOAP UI (pro) in a groovy script:

I have the following part of code :

def response = 0
try
{
	response = new XmlParser().parseText(context.Response);
	//log.info response
} catch(NullPointerException e){
	log.info e
	testRunner.fail( "Authentication rejected" )
}

When the previous step have faile, if I run the step alone I end up with the following Script log:

Thu Nov 23 09:29:42 CET 2017:INFO:java.lang.NullPointerException
Thu Nov 23 09:29:42 CET 2017:ERROR:Failed with reason [Authentication rejected]

But when I launch the testCase and it fails for the same reason, I end up with :

Thu Nov 23 09:29:52 CET 2017:INFO:java.lang.NullPointerException

only.

Do anyone know why the ERROR log does not appear ?

I checked that, if I launch my testCase with the testRunner, the ERROR log appears.

thank you

Alexandre