In the afternoon, I learned DB2 and suddenly I couldn't start the Control Center. I have been reporting JDBC errors. Try to find that all clients are invalid. Entering Service and found that DB2 JDBC Applet Server cannot start (set to automatically start). Entering Event Viewer, found suspicious log: DB2Start: SQL10007N Message "-1063" Could Not Be Retrieved. Reason code: "5". Google Search is found to be local LOCALE settings I want to install violet to modify local LOCALE Change China (PRC) Restart the system successfully! PS: This should be a setting problem, not related to the database itself, so the clues cannot be found in the log of DB2.