Dear,
To see which labels exist and who reference them see our tool kixref, which
you can find on our site.
For a quick view use the call kixref input.kix output.txt /warnings
With the kixstrip tool you can find indeed all kind of mistypings. Documenta-
tion is also available. The file kixstrip.pdf can be find on our site too.
For a fast way of cheking you code insert as first line
code:
GOTO checking_our_script
and add as last lines
code:
:checking_our_script
? "fast verification completed"
To see what is going wrong during execution you can use the kixstrip too.
With the call kixstrip input.kix output.kix /debug additional code will be inserted,
which will show during execution
- which lines were executed
- what was the error status
- how much time did it consume
etc.
greetings.
BTW: GOSUB and GOTO doesn't need quotations.
btw: symbol 
on our homepage has been linked to related http://kixtart.org topic.
