Notes initialization failure - err 4103

I have Lotus Notes client 7.0 loaded , any Java programs that run as scheduled agents fail with the Notes initialization error after working ok for a day or so. It starts working again after the system is restarted. Has anyone seen this error and a possible solution for it.

java.lang.Exception: Notes initialization failure - err 4103

    at lotus.domino.NotesThread.NnotesInitThread(Native Method)

    at lotus.domino.NotesThread.initThread(Unknown Source)

    at lotus.domino.NotesThread.run(Unknown Source)