You can change the number of cores being used in OpticStudio User Interface.

For example when launching raytracing in non-sequential mode.



Here is how to do the same thing from within a ZPL macro:



!through the system properties, code 901:

SYSP 901, 1



!measure time

TIMER

!raytrace

NSTR 1, 0, 0, 0, 0, 1, 0

PRINT "Elapsed time:", ETIM(), "Seconds"

!number of cores

print SYPR(901)

SYSP 901, 16

TIMER

!raytrace

NSTR 1, 0, 0, 0, 0, 1, 0

PRINT "Elapsed time:", ETIM(), "Seconds"

print SYPR(901)

Here is the text output: