这是oracle帮助中的信息，看看。
IMP-00037 Character set er unknownCause: The export file is corrupted.Action: Try to obtain an uncorrupted version of the export file. If the export file is not corrupted, report this as an Import internal error and submit the export file to Oracle Customer Support.
IMP-00037 Character set er unknownCause: The export file is corrupted.Action: Try to obtain an uncorrupted version of the export file. If the export file is not corrupted, report this as an Import internal error and submit the export file to Oracle Customer Support.
要修改注册表和数据库，然后重新启动数据库
参考下
http://expert.csdn.net/Expert/topic/1844/1844465.xml?temp=.4618647
大意是更改后的字符集必须是现有字符集的超集，才不会造成数据损坏。
Changing the Character Set After Database Creation
In some cases, you may wish to change the existing database character set. For instance, you may find that the number of languages that need to be supported in your database have increased. In most cases, you will need to do a full export/import to properly convert all data to the new character set. However, if, and only if, the new character set is a strict superset of the current character set, it is possible to use the ALTER DATABASE CHARACTER SET statement to expedite the change in the database character set. The target character set is a strict superset if and only if each and every codepoint in the source character set is available in the target character set, with the same corresponding codepoint value. For instance, the following migration scenarios can take advantage of the ALTER DATABASE CHARACTER SET statement because US7ASCII is a strict subset of WE8ISO8859P1, ZHS16GBK, and UTF8: Table 3-8 Sample Migration Scenarios
Current Character Set
New Character Set
New Character Set is Strict Superset?
US7ASCII
WE8ISO8859P1
Yes
US7ASCII
ZHS16GBK
Yes
US7ASCII
UTF8
Yes
Attempting to change the database character set to a character set that is not a strict superset can result in data loss and data corruption. To ensure data integrity, whenever migrating to a new character set that is not a strict superset, you must use export/import. It is essential to do a full backup of the database before using the ALTER DATABASE [NATIONAL] CHARACTER SET statement, since the command cannot be rolled back. The syntax is: ALTER DATABASE [<db_name>] CHARACTER SET <new_character_set>;
ALTER DATABASE [<db_name>] NATIONAL CHARACTER SET <new_NCHAR_character_set>;
The database name is optional. The character set name should be specified without quotes, for example: ALTER DATABASE CHARACTER SET WE8ISO8859P1;
To change the database character set, perform the following steps. Not all of them are absolutely necessary, but they are highly recommended: SQL> SHUTDOWN IMMEDIATE; -- or NORMAL
<do a full backup>SQL> STARTUP MOUNT;
SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION;
SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
SQL> ALTER DATABASE OPEN;
SQL> ALTER DATABASE CHARACTER SET <new_character_set_name>;
SQL> SHUTDOWN IMMEDIATE; -- or NORMAL
SQL> STARTUP;
To change the national character set, replace the ALTER DATABASE CHARACTER SET statement with the ALTER DATABASE NATIONAL CHARACTER SET statement. You can issue both statements together if desired.
SIMPLIFIED CHINESE_CHINA.ZHS16GBK
SIMPLIFIED CHINESE_CHINA.ZHS16CGB231380
有没有其他的？
Locale Data。详细信息请自己查Table A-4 Asian Language Character Sets
BN8BSCII
Bangladesh National Code 8-bit BSCII
SB, ASCII
ZHT16BIG5
BIG5 16-bit Traditional Chinese
MB, ASCII
ZHS16CGB231280
CGB2312-80 16-bit Simplified Chinese
MB, ASCII
JA16EUC
EUC 24-bit Japanese
MB, ASCII
JA16EUCYEN
EUC 24-bit Japanese with '\' mapped to the Japanese yen character
MB
JA16EUCFIXED
EUC 16-bit Japanese. A fixed-width subset of JA16EUC (contains only the 2-byte characters of JA16EUC). Contains no 7- or 8-bit ASCII characters
FIXED
ZHT32EUC
EUC 32-bit Traditional Chinese
MB, ASCII
ZHT32EUCFIXED
EUC 32-bit Traditional Chinese (32-bit fixed-width, no single byte)
FIXED
ZHS16GBK
GBK 16-bit Simplified Chinese
MB, ASCII, UDC
ZHS16GBKFIXED
GBK 16-bit Simplified Chinese (16-bit fixed-width, no single byte)
FIXED, UDC
ZHT16CCDC
HP CCDC 16-bit Traditional Chinese
MB, ASCII
JA16DBCS
IBM EBCDIC 16-bit Japanese
MB, UDC
JA16EBCDIC930
IBM DBCS Code Page 290 16-bit Japanese
MB, UDC
JA16DBCSFIXED
IBM EBCDIC 16-bit Japanese (16-bit fixed width, no single byte)
FIXED, UDC
KO16DBCS
IBM EBCDIC 16-bit Korean
MB, UDC
KO16DBCSFIXED
IBM EBCDIC 16-bit Korean (16-bit fixed-width, no single byte)
FIXED, UDC
ZHS16DBCS
IBM EBCDIC 16-bit Simplified Chinese
MB, UDC
ZHS16CGB231280
FIXED
CGB2312-80 16-bit Simplified Chinese (16-bit fixed-width, no single byte)
FIXED
ZHS16DBCSFIXED
IBM EBCDIC 16-bit Simplified Chinese (16-bit fixed-width, no single byte)
FIXED, UDC
ZHT16DBCS
IBM EBCDIC 16-bit Traditional Chinese
MB, UDC
ZHT16DBCSFIXED
IBM EBCDIC 16-bit Traditional Chinese (16-bit fixed-width, no single byte)
FIXED
KO16KSC5601
KSC5601 16-bit Korean
MB, ASCII
KO16KSCCS
KSCCS 16-bit Korean
MB, ASCII
KO16KSC5601FIXED
KSC5601 (16-bit fixed-width, no single byte)
FIXED
JA16VMS
JVMS 16-bit Japanese
MB, ASCII
ZHS16MACCGB231280
Mac client CGB2312-80 16-bit Simplified Chinese
MB
JA16MACSJIS
Mac client Shift-JIS 16-bit Japanese
MB
TH8MACTHAI
Mac Client 8-bit Latin/Thai
SB
TH8MACTHAIS
Mac Server 8-bit Latin/Thai
SB, ASCII
TH8TISEBCDICS
Thai Industrial Standard 620-2533-EBCDIC Server 8-bit
SB
ZHT16MSWIN950
MS Windows Code Page 950 Traditional Chinese
MB, ASCII, UDC
KO16MSWIN949
MS Windows Code Page 949 Korean
MB, ASCII, UDC
VN8MSWIN1258
MS Windows Code Page 1258 8-bit Vietnamese
SB, ASCII, EURO
IN8ISCII
Multiple-Script Indian Standard 8-bit Latin/Indian
Languages
SB, ASCII
JA16SJIS
Shift-JIS 16-bit Japanese
MB, ASCII, UDC
JA16SJISFIXED
Shift-JIS 16-bit Japanese. A fixed-width subset of JA16SJIS (contains only the 2-byte characters of JA16JIS). Contains no 7- or 8-bit ASCII characters
FIXED, UDC
JA16SJISYEN
Shift-JIS 16-bit Japanese with '\' mapped to the Japanese yen character
MB, UDC
ZHT32SOPS
SOPS 32-bit Traditional Chinese
MB, ASCII
ZHT16DBT
Taiwan Taxation 16-bit Traditional Chinese
MB, ASCII
ZHT16BIG5FIXED
BIG5 16-bit Traditional Chinese (16-bit fixed-width, no single byte)
FIXED
TH8TISASCII
Thai Industrial Standard 620-2533 - ASCII 8-bit
SB, ASCII, EURO
TH8TISEBCDIC
Thai Industrial Standard 620-2533 - EBCDIC 8-bit
SB
ZHT32TRIS
TRIS 32-bit Traditional Chinese
MB, ASCII
ZHT32TRISFIXED
TRIS 32-bit Fixed-width Traditional Chinese
FIXED
SIMPLIFIED CHINESE_CHINA.ZHS16GBK
SIMPLIFIED CHINESE_CHINA.ZHS16CGB231380
我建议使用前者，他支持的汉子很多，足可以满足需要，理论上SIMPLIFIED CHINESE_CHINA.ZHS16GBK 是 SIMPLIFIED CHINESE_CHINA.ZHS16CGB231380 的超集，但是
oracle不这么认为，所以不能使用 alter database 命令进行升级，如果你一定要从ZHS16CGB231380 升级到 ZHS16GBK 的话，我也有方法，是修改一些数据库的数据字典，
不过这种方法没有得到oracle官方的认可，我已经升级过很多次了，没有出现任何问题，
如果你有这个方面的需要，可以发 Email 给我：[email protected]
ZHS16GBK 这个字符集是一个过渡性的国家标准，但是现在已经非常流行了，主要是windows一直在使用，现在最新的标准是GB 18030-2000 ，但是现在oracle好像不支持，起码8i还不支持。所以使用 ZHS16GBK 是最好的选择。
字符集选择“AMERICAN_AMERICA.US7ASCII”；
几种办法我也试了，我现在也怀疑这个备份文件有问题，也许不是exp出来的
我现在还没有确定。