objectsWhere crash

[aloesshine]

`

NSArray *draftArray = [AWEVideoDraftModel objectsWhere:@"WHERE backup = 1 AND step > 0 AND step < 30 ORDER BY saveDate DESC" arguments:nil];  

#0Crashed: com.apple.main-threadEXC_BAD_INSTRUCTION 0x0000000000000000 Raw Text

0 | | -[GYDataContext queueForDBName:] + 330
1 | |  +[GYModelObject objectsWhere:arguments:] + 120

`

求大佬解答