sqlAOpen error message running Cognos 8.2 reports

[98770]

All of a sudden, all of our cognos reports started getting the following error message:

An error occurred while performing operation 'sqlAOpen' status='-9'.

Could this be a dispatcher/services issue?.   One of the dispatchers (and its services) has the unknown symbol.   When I 'test' the dispatcher, it says succeeded.   For the services, if I try to start them, I get a 'failed' message.

Any ideas what I should try?