Assertion failed

Dears

I am seeing below error in NPS logs,

05/17 00:05:33. *** ERROR *** Assertion failed: 200509 (16.0.0.2805)
Checksum of critical sectors for page 0 failed
05/17 10:21:07. Cannot open transaction log file -- perfspi.log is an invalid transaction log

Because of this we are seeing NPS is not able to start Sybase IQ database.

Please let me know how to solve this issue.