I kept getting this error whenever I tried to access some resources on the server side. It seemed that I couldn't get anything back from my remote
servlet.
After much searching, I stumbled upon this particular
thread:
http://groups.google.com/group/google-web-toolkit/browse_thread/thread/ca5722230f14f54e
Apparently, you need to download these two files, and put them into the correctly named package in your GWT project. They don't need to be rejarred into the Gilead jars; they just need to be there in your project.
The Package/Folder they need to be in under your source directory: com/google/gwt/user/server/rpc/
http://trg-commons.googlecode.com/files/RPCCopy.java
http://trg-commons.googlecode.com/files/RPCCopy_GWT20.java
I had errors when I brought in RPCCCopy, but it had to do with the 1.6 version, so I just commented those lines out and returned nulls. I coded those parts something like this:
-Cameron McKenzie