I am currently running Informix 5.10.UC1 on AIX 4.3.3. An intermittant problem occurs while running a back (tbtape -s). Upon running a backup, I recieve a checkpoint waiting --- Fail Consistency Check. As I mentioned, this problem does not happen all the time. Sometimes it will happen several days in a row, and then after running a dbexport/dbimport the problem will subside for a while. Does any one have any ideas as to how to troubleshoot this kind of error??