PIX syslog message: no route to IP1 from IP2

[dbadic]

Does anyone knows what following syslog message means?

no route to IP1 from IP2

where IP1 is PIX PAT address and IP2 is remote server address

Anyone had this log?

[lwierenga]

110001

Error Message %PIX-6-110001: No route to dest_address from source_address

This message indicates a route lookup failure. A packet is looking for a destination IP address which is not in the routing table.

Check the routing table and make sure there is a route to the destination.

[dbadic]

dest_address is address PIX knows well. It uses it for PAT on outside interface so routing table should not have anything to do with this. any other ideas?

thanks