Error For missing parameters,
My grid block size is 1 x 1 cm. The error said that I have a problem with specific element eventhough it is defined. I am not sure what is the issue. Could you please help me.
This simply means it is convergence failure. So you need to try to find possible reason why there is a failure of convergence. There are several reasons which need to be explored. Best option is to try to modify and existing tutorial file and not try to setup a complex problem in the first try