RTL_PJL did not work

[fraz]

When I build a drive for rtl plotter I try to use the $RTL_PJL constant, but it didn't worked.
So I used the number 1.

--8<--- dsgnjt750c.drv ---
ModelNumber ($RTL_PJL)
--8<--- dsgnjt750c.drv ---

fraz at george:~/src/cupsddk> ppdc  dsgnjt750c.drv
ppdc: Undefined variable (RTL_PJL) on line 16 of dsgnjt750c.drv.

Should I post a str?

regards
Franz