dataobject with 1 to N relation with Users table not updating

Hello,

I am having problems updating a object having one-to-many relationship with Users table. when i was using my java class for datatable… the app crashes saying stackoverflowexception.Then i replaced my dataobject java class with backendless code generated file.after that every time in async handler is throwing Backendlessfault with code :null and message : illegalArgumentException

plesase help ASAP

Hello!
Please send your project to support@backendless.com and comment where exactly you have this issue.
Alex