Differences in AIC and BIC in SEM software

Today, Michael and I tried out the current beta version of OpenMx. When estimating one of the models we use in our workshops, we found out that Mplus, Amos, Lisrel and OpenMx produce different values for AIC and BIC. In a next step, we’ll have to check the formulas implemented in the programs. It would be very nice if at least two of the programs produced the same values, as it makes comparisons easier for beginners.