XNMI rule function is not working ?

[daemonserj]

Hi.
I'm trying to write simpe rule to make conversion like:

# for 6 length mask 012345 -> 012345345012
M X336 X039

But it seems that functions "M" and "XNMI" are not working.
After start I got:
"Cannot convert rule for use on OpenCL device in file my.rule on line 11: M X336 X039"
Is it a bug or I not understand something ?