redo logs

We're getting the following messages in the alert log. Can a kind soul in the list enlighten me with potential problems and the possible cause? Thanks in advance.

Thread 1 advanced to log sequence 7048
  Current log# 2 seq# 7048 mem# 0: /oracle03/oradata/ORTE/redoORTE02.log Wed Jul 12 06:30:47 2000
Thread 1 cannot allocate new log, sequence 7049 Checkpoint not complete
  Current log# 2 seq# 7048 mem# 0: /oracle03/oradata/ORTE/redoORTE02.log Wed Jul 12 06:31:12 2000

Thanks

Ana E. Choto
Systems Programmer
American University
Office of Information Technology
Phone (202) 885-2275
Fax (202) 885-2224 Received on Wed Jul 12 2000 - 09:21:45 CDT