I am running a series of bivariate latent change score models (McArdle 2001). For some models, the program freezes without even providing output. The strange thing is that the same code, same data will work for slightly different models. For example, the dynamic coupling model works, but when I constrain the parameters to make it a leading indicator model (a subset of the coupling model), it freezes. Thoughts?
BTW, I'm using a brand new Mac with the most updated software.