i am trying to set the environment variables in tcsh shell and it is not working. This is the syntax that i am using currently setenv MYSQL_HOME=/opt/mysql/mysql/bin my other question is i have a c-shell script that i am editing. Is setenv the same as a regular set MYSQL=${MYSQL_HOME}/bin/sqlplus? set MYSQL_HOME=/opt/mysql/mysql/bin or should i just set the MYSQL_HOME to where the mysql executable is ?