29 Terabytes? That's what the alter database you have there sets the file size to. Is that really the size that you want the file?

The maximum size of a database file is 16 terabytes, so I would fully expect that alter database to fail. If you really do have a database that's many terabytes in size, you'll have to add more files to the existing filegroups rather than grow existing files, as the hard limit on the size of a single file is 16 TB (16777216 MB)