marginal effects and relative standard errors of mvord

I am Alessandro Indelicato, a PhD student at the University of Las Palmas de Gran Canaria and I am working on my PhD thesis.

Thanks to the mvord package, I was able to estimate a model with two dependent variables (y1 and y2). After estimating the model, I encountered a problem: I wasn’t able to estimate the marginal effects and relative standard errors of: y1 = 1 y2 = 1; y1 = 1 y2 = 4; y1 = 4 y2 = 1; y1 = 4 y4 = 4.

Could you please give me some suggestions about this matter?

Best,
Alessandro