idgn and imodel not creating in the MicroStation. I am using the version 10.13.01.01 right now, can someone tell me why?

I use to create .idgn for the federated model to use it on clash detection purpose. It use to work fine at start. But from last couple of days I am getting this error to say ' Please create a package file and then create I-model. and unable publish business data ..etc.. can some one tell me why ?