what does this mean and how do ifix it!

[Sivla]

Timeout expired. The timeout period elapsed prior to obtaining a connection
from the pool. This may have occurred because all pooled connections were in
use and max pool size was reached.

 

[Geoff Pennington]

The "connection" is probably a database connection. Either you simply had
more processes attempting to connect to the database than the system could
handle (which may be limited by whatever kind of license you have - I'm not
sure) or your code is not closing connections when finished with them. In
that case you simply have to go into your code and make sure you close the
connections when finished.