Forum OpenACS Q&A: Sendmail: Error: child process exited abnormally

I receive the error message below once a minute when the acs_mail_lite sweeper runs. Sendmail seems to be choking but a sendmail restart or aolserver restart does not resolve the problem.

From the mail log there seems to be some kind of bounce loop. How do I resolve this? Any help would be appreciated!

Thanks!

28/Feb/2007:07:38:48
    Error: child process exited abnormally
child process exited abnormally
    while executing
"close $f"
    ("uplevel" body line 19)
    invoked from within
"uplevel $code"
    invoked from within
"with_finally -code {
		    set sendmail [list [bounce_sendmail] "-f[bounce_address -user_id $rcpt_id -package_id $package_id -message_id $message_id]"..."
    (procedure "sendmail" line 6)
    invoked from within
"sendmail -from_addr $from_addr -sendlist $to_addr -msg $msg -valid_email_p $valid_email_p -message_id $message_id -package_id $package_id"
    (procedure "deliver_mail" line 55)
    invoked from within
"deliver_mail -to_addr $to_addr -from_addr $from_addr  -subject $subject -body $body -extraheaders $extra_headers  -bcc $bcc -valid_email_p $valid_emai..."
    ("uplevel" body line 2)
    invoked from within
"uplevel $code"
    invoked from within
"with_finally -code {
		    deliver_mail -to_addr $to_addr -from_addr $from_addr  -subject $subject -body $body -extraheaders $extra_headers  -bcc $bcc..."
    ("uplevel" body line 2)
    invoked from within
"uplevel 1 $code_block "
    ("1" arm line 1)
    invoked from within
"switch $errno {
                0 {
                    # TCL_OK
                }
                1 {
                    # TCL_ERROR
               ..."
    ("while" body line 20)
    invoked from within
"while { [db_getrow $db $selection] } {
            incr counter
            if { [info exists array_val] } {
                unset array_val
         ..."
    ("uplevel" body line 5)
    invoked from within
"uplevel 1 $code_block "
    invoked from within
"db_with_handle -dbn $dbn db {
        set selection [db_exec select $db $full_statement_name $sql]

        set counter 0
        while { [db_getrow $..."
    (procedure "db_foreach" line 36)
    invoked from within
"db_foreach get_queued_messages {} {
		with_finally -code {
		    deliver_mail -to_addr $to_addr -from_addr $from_addr  -subject $subject -body $body -..."
    ("uplevel" body line 2)
    invoked from within
"uplevel $code"
    invoked from within
"with_finally -code {
	    db_foreach get_queued_messages {} {
		with_finally -code {
		    deliver_mail -to_addr $to_addr -from_addr $from_addr  -subj..."
    (procedure "acs_mail_lite::sweeper" line 8)
    invoked from within
"acs_mail_lite::sweeper"
    ("eval" body line 1)
    invoked from within
"eval [concat [list $proc] $args]"
    (procedure "ad_run_scheduled_proc" line 46)
    invoked from within
"ad_run_scheduled_proc {t f 60 acs_mail_lite::sweeper {} 1172612167 0 f}"
    Notice: -- starting, ::chat::Chat ::xo::ChatClass->sweep_all_chats (0ms)