How I can solve error in local_scaling function from Weaclim toolbox?

When I use local_scaling function from weaclim toolbox, I get a warning message:

    [GCM3,PGCM,SCALING]=local_scaling(mod,obs,seas3,1);
  Warning: Size vector should be a row vector with integer elements. 
  > In copy at 20
    In local_scaling at 34 
  Error using reshape
  Size arguments must be real integers.

Error in copy (line 21)
X=reshape(X,NC,NR*N);

Error in local_scaling (line 34)
S=copy(seas,nyear);

The mod and obs are the modeled and obsrved precipitation values in 3D matrices in function of longitude, latitude and days (464x201x10957) from 1961.01.1 to 1990.12.31. The seas3 is a 360 long vector which contains the months (e.g 31,28,31,30,….31) during the 30 years.

Could someone write me what I made wrong and what I should to do?