Fit model with categorical variables (two of them 3 level and one 2 level)

[#1]

When I generate fit model with 3 categorical variables (two of them 3 level and one 2 level), it does not generate std error, t ratio and p values, can you please help why is it?

[#2]

Hi,
Without seeing an example of your data, it is difficult to provide an answer but, often, the problem is related to the lack of observation / data across the entire spectrum of the variables in your model. I would recommend to explore your data in Graph Builder to visually assess the data coverage across conditions before going through the development of a model.
Best,
TS