I also had this problem, and I fixed it. I found that it occurs when
you have a com.google.appengine.api.datastore.Text field, and you
construct it with a null. That is, new Text(null).
The workaround, if the string is null, make the text property null.
On Apr 16, 4:40 pm, Coelho
I would report the same problem and maybe help with more details.
I change the primary key of a persisntant propertie of my class from
String to Long, and after a lot of problems with that I, decide to get
back for String type. After that my objects couldn´t be persistant
anymore.
Please help
