I am running a script in batch ... with isqlw and oSql...

I want to loog all error in the process but a each command the file was reseted.... who can I append the error in a text file??

Command exemples:
isqlw.exe -S %SERVER_NAME% -E -d master -o log_install.log - i install.sql
echo ...
isqlw.exe -S %SERVER_NAME% -E -d %DATABASE_NAME% -o log_install.log -i create_table.sql

At the end only error in create_table.sql was there!!

Who can I do??

thanks