WebTestOverview.xml does not exist

Hy All

If i try to use code like this i always get this Error...
Does some one now with property is missing there?


                                               def page = step.context.currentResponse
                                               def pageAsXML =  page.asXml()
                                               def file = new File('./htmlunit.html')
                                               file.write(pageAsXML)


 There was 1 error:
1) testPSBNS(PSBNSWebtestTest)groovy.lang.MissingPropertyException: No such property: step for class: PSBNSWebtestTest
        at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:49)
        at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(PogoGetPropertySite.java:49)
.
.
.
.


FAILURES!!!
Tests run: 1,  Failures: 0,  Errors: 1


wt.parallel.waitForCompletion:

wt.htmlReports:
     [echo] Waiting for completion of background generation of single reports
     [echo] Generating WebTestOverview

wt.openResultFile.init:

wt.openResultFile:
     [echo] Opening result file C:\myWebTestProject\results\index.html with cmd

wt.junitLikeReports:

BUILD FAILED
C:\Webtest\webtest.xml:446: input file C:\myWebTestProject\results\WebTestOverview.xml does not exist


Best regards
Pascal