remove interaction effect testing in ezANOVA

[tab-L]

Hi

I found the ezANOVA function very useful for repeated measures anova.
In my case now got two between and one within factor variables I need to implement in the model, but I am limited with number of replicates and only receive results, if I exclude one of the factor variables (due to a lack of degrees of freedomn I guess -> DFd becomes 0, F and p values become NaN)
Fortunateley there seems to be no relevant interaction between the factor variables, as I expected anyway, consequently I am not interested in the interaction effect of those. But I found no way to turn off analysis of interaction effect.
if I try following
ezANOVA(data, dv = .(respond), wid = .(subject), between = .(factor1, factor2), within = time, detailed = TRUE)
of course I ask for interaction effect as well. Too litte DF and no result. I therefore eliminate either f1 or f2 :-(

Would be cool to be able to specify to not investigate interaction, as for example possible in a normal anova with error term by using the '+' sign instead of the '*' asterisk, like
aov(respond ~ factor1 + factor2 + time + Error(subject/(time)), data))
(in this way I received F and p values etc.)