Hi In GMS I've created a model using the MODFLOW and MT3D package. I'm using the chemical reaction package to deal with dual porosity. However, I haven't been able to locate the file in which the sorbed concentration in the immobile fase is stored. I'm able to find the total mass balance for the entire system in the .out file, but I have an idea that the concentration in each cell is located in the .con file. Am I correct in this assumption? Also, is there a way to read this binary file? Best regards Christian Winde