Forum OpenACS Q&A: Error: nsd.tcl: can't read "QQemail": no such variable

Most of the errors I get running OpenACS 3.2.2 have been posted
here
already, but here's a new one I haven't seen before:

Errors since 28/Aug/2000:08:44:28

[28/Aug/2000:08:44:28]
    Error: nsd.tcl: can't read "QQemail": no such variable
    can't read "QQemail": no such variable
        while executing
    "ns_db 0or1row $db "select user_id, user_state, converted_p from
users where upper(email)=upper('$QQemail')""
        invoked from within
    "set selection [ns_db 0or1row $db "select user_id, user_state,
converted_p from users where upper(email)=upper('$QQemail')"]"
        (file "/pub/www/acs/www/register/user-login.tcl" line 17)
        invoked from within
    "source $script"
        (procedure "ns_sourceproc" line 6)
        invoked from within
    "ns_sourceproc cns3444 {}"
    Notice: nsd.db: opening:  postgres:localhost::acsdb