Bayesian GLM in R using inverse gaussian family

Question

I am trying to fit a bayesian glm model to my data assuming an inverse family of distribution and link=(identity). I am getting the following message:

Error in if (iter > 1 & abs(state$dev - devold)/(0.1 + abs(state$dev)) <  : 
  missing value where TRUE/FALSE needed

I'm not quite sure why I'm getting an error message as my code works for family =gaussian and link=identity.