divergence in AMG and floating point
 

hi I`m trying to use UDF for density. I have a source file, I compiled it and everything was OK. I hooked it in material properties panel and everythin was OK. But when I wanted to start iteration (VOF model - water in tank) I next error appeared: "divergence datected in AMD solver.: pressure correcton. Error object ()"

or

"floating point error: invalid number. Error object: ()"

How to repair it?? Please give me any suggestion