java.lang.NullPointerException if request with derived-types is used in 1.7.5 R

Ahoi Ole,

nullpointer exception happens, if I am doing following steps:

1. Create a new wsdl project: test
2. select the wsdl...
3. First thing which seems to be going wrong is in the tree structure there's only one entry
but includes two requests!!!
4. then I dblclick on the first request to open it, then I will get that null.pointer exception!

Attached you will find a screen_shot.jpg where you can see how it looks on my screen
and my saved project file: test-soapui-project.xml

Bye

ChrisE