problem with export

FILE=TRY.DMP TABLES=TEST QUERY=\"WHERE A\<30\"

i AM HAVING A ORACLE8I DATABASE.
I am trying to export selected rows from a table A (having an attribute b(number))using exp command and query keyword. i am executing the following command (exporting rows of table a whose b attribute is <30)

exp scott/tiger tables=a file=try.dmp query=\"where b\<30\"

But i am getting the following error

EXP 00056: Oracle error 911 encountered
ora 00911: Invalid character
export terminated successfully with warnings.

for the above EXP command if i use a parameter file param.txt which contains the following statement

file=try.dmp tables=a query=\"where b\<30\"

and try to execute the exp command as below exp scott/tiger parfile=param.txt

i am getting the following error

LRM-00112: Multiple values not allowed for parameter 'query'
LRM-00113: error when processing file 'param.txt'
EXP-00019: Failed to process parameters, type 'EXP HELP=Y' for help
EXP-00000: Export terminated unsuccessfully

what is the problem and give solution?
where can i get cause and solution for the error numbers? Received on Wed Mar 12 2003 - 07:25:25 CET