MAPI - check if connection is usable

I am using MAPI C library to talk to multiple monetdb databases. I cache the connection (struct mapi) to reduce overhead. However if a database/machine restarts then the connection is not usable.  How do I determine if a cached connection is usable before actually using it. I have tried mapi_is_connected() and mapi_ping(). But mapi_ping always returns 0 while mapi_is_connected always returns 1. Thansk and Regards, Tapomay. _______________________________________________ users-list mailing list users-list@monetdb.org http://mail.monetdb.org/mailman/listinfo/users-list