Find and replace bug
When you want to find and replace something ( "?" in my case) to nothing "" you have to change first 1 character with " " and then delete " " to "" and find replace all.
Forum Discussion
Please see if the below thread is helpful.
http://stackoverflow.com/questions/39240667/how-to-set-default-value-in-request-xml-of-soapui-other-than/39241063#39241063
http://stackoverflow.com/questions/39240667/how-to-set-default-value-in-request-xml-of-soapui-other-than/39241063#39241063