Can't take export backup

Hello,
I can't take export backup as it ends up with a message column name invalid.How to solve the problem. My database is on UNIXWARE 7.1.1 & Oracle8i.
D ROY
SHILLONG- INDIA

content of the log file:
Connected to: Oracle8i Enterprise Edition Release 8.1.7.4.0 - Production
With the Partitioning option
JServer Release 8.1.7.4.0 - Production
Export done in US7ASCII character set and US7ASCII NCHAR character set
About to export the entire database ...
. exporting tablespace definitions
. exporting profiles
. exporting user definitions
. exporting roles
. exporting resource costs
. exporting rollback segment definitions
. exporting database links
. exporting sequence numbers
EXP-00008: ORACLE error 904 encountered
ORA-00904: invalid column name
EXP-00000: Export terminated unsuccessfully
Last line of the dmp files
CONNECT SYSTEM
EXECFULL DBMS_DISTRIBUTED_TRUST_ADMIN.allow_all;
CREATE SEQUENCE "AQ$_QIDSEQ" MINVALUE 1 MAXVALUE 999999999999999999999999999 INCREMENT BY 1 START WITH 21 CACHE 20 NOORDER NOCYCLE
___________________________________

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>
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>
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¯\_(ツ)_/¯

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