Originally posted by pando
select * from dba_segments where next_extent > 38400 * db_block_size

and see what's the segment causing the problem

Thanks pando.
select segment_name,segment_type from dba_segments where next_extent >= (38400 * 8192)

SEGMENT_NAME SEGMENT_TYPE
-------------------------------------------

SYS_IL0000011225C00004$$ LOBINDEX
SYS_IL0000010344C00005$$ LOBINDEX
SYS_LOB0000011225C00004$$ LOBSEGMENT
SYS_LOB0000010344C00005$$ LOBSEGMENT

Thanks In Advance.