Error is displayed while saving project after updating the name mapping file

Description: Error "out of memory while expanding the memory stream" is being displayed while saving project after adding few objects to name mapping. Map few new objects using TC & save the project. Error mentioned in the attached doc is displayed.

The size of the name mapping file is about 115 MB.

TC version : version 8.0.290.7

Type of the application: WCF/WPF dot net application