Oracle error 1406, extracted column values are truncated

To back up the data, you need to export the complete data of 11 GB users on the server. The client on the machine is Oracle10g. Run the command: exp ***/*** @ *** file = ***. dmp full = y

After the command is executed, the system prompts:

EXP-00008: ORACLE error 1406

ORA-01406: extracted column values are truncated

EXP-00000: Export termination failed

I checked a number of materials, some said that the client and the server did not match, but the leaders said that the machine was used for backup in January. Then there were a lot of unheadned flies doing searches, and there was no way. Finally, the leader told him to export the written exp and asked me what full = y meant. At that time, it was not clear that this was to export all data objects under the instance where the current user is located. Sorry, you are ignorant! I only need to back up the data of the current user. Then we removed the full = y at the end, and added the owner = *** (the same as the previous one). Finally, we were able to see the backed up data tomorrow. Self-satisfied.