Hspeak being fussy about if conditions

Hey, I'm trying to put in an if condition that checks for 'one thing && another thing' and Hspeak is rejecting it.

Here's the line:


Is there a different way for me to write && conditions that it'll be happier with?

EDIT:
Whoops, should put in the error message:

Unrecognised name startx-1. It has not been defined as a script, constant, variable, or anything else

Ugh, nevermind, I got it. I have to do 'x -- 1' and not 'x - 1'.