SP2-0642: SQL*Plus internal error state 1075

Hi,

I am looking this error message in auto trace output first time. If any one experienced it any time could please share your findings about what does this means?

Quote:

---

Statistics
----------------------------------------------------------
47 recursive calls
8 db block gets
2048752 consistent gets
2040449 physical reads
1488 redo size
SP2-0642: SQL*Plus internal error state 1075, context 1:5:4294967295
Unsafe to proceed
62755244 bytes received via SQL*Net from client
5704906 SQL*Net roundtrips to/from client
2 sorts (memory)
0 sorts (disk)
85573569 rows processed

---

Thanks,