Following error received:

26 proc power;
27 twosamplefreq test=FM
28 refproportion=0.004 proportiondiff=0.003
29 power = 0.8
30 alpha = 0.05
31 npergroup =.
32 sides = 1;
33 run;

ERROR: NPERGROUP is not available as a result option for TEST=.
NOTE: The SAS System stopped processing this step because of errors.