Hi, We understood the urgency of your problem. But the manual says as follows:

This is the generic internal error number for Oracle program exceptions. It indicates that a process has encountered a low-level, unexpected condition. Causes of this message include:

timeouts
file corruption
failed data checks in memory
hardware, memory, or I/O errors
incorrectly restored files

I think, you may have to check-up your system completely to identify any of the above incidents happened in your database. Please check all the alert log files. This is the better time to contact for ORACLE WORLD-WIDE CUSTOMER SUPPORT or any of your senior experts. We don't know the all the details of your database. But you can check for all the possibilities.

Regards,
A.P.BALASUBRAMANIAN