package issue with unmarshalling

I tried to unmarshal an object that resides in a package. It gave:
.mapper.CannotResolveClassException: ObjectImport (my class name).
I had done the alias command which works for marshalling OK, but unless I recompile the program WITHOUT the package and place it in the unpackaged classpath, it can't find it. Is there a way to see a packaged class without doing this?