Scripts at_allow01 and at_deny01 contain incorrect usage of 'if' command. Command 'type at' returns 0 (true) if 'at' command is installed. Therefore conditional command:
if type at > /dev/null; then
tst_resm TCONF "at command not found on system"
generated communicate "at command not found on system" when 'at' is actually installed. The attachment contains patch that fixes overmentioned problem.