ANOVA table without ineraction

Hello everybody.

I am trying to construct a ANOVA table using anova2, this is to study if a matrix with 15 rows (which are 5 blocks), 3 columns which represent 3 treatments has significant differences between blocks or treatments. My model implies that there is no interaction between block and treatment, but anova2 shows it nonetheless.

Can someone please tell me how can I tell anova2 that I consider that there is no interaction between block and treatment or suggest me another function?

Thanks.