-900 THE SQL STATEMENT CANNOT BE EXECUTED BECAUSE THE APPLICATION PROCESS IS NOT CONNECTED TO A SERVER

Explanation
 A
previous failure has placed the application process in the unconnected
state. An unsuccessful request to switch the user in a trusted connection
can cause the connection to go into an unconnected state. The only
SQL statements that can be successfully executed from the unconnected
state are CONNECT, COMMIT, ROLLBACK, and local SET statements.

System action
 The statement cannot be processed.

Programmer response
 It is possible that no response is required
because checking for -900 is one way of detecting the unconnected
state. If this error is the result of another situation, the logic
of the application program must be changed.

SQLSTATE
 08003