How to change “nl_abs_tol” during running by Controls function?

[lipxisi]

Hello

Some reasons caused my calculation example to be difficult to converge at the beginning, requiring a larger convergence criterion. However, after running for some time, the convergence becomes good, and at this point, a smaller convergence criterion is needed to ensure continuous calculations. I hope to use the control function to change “nl_abs_tol” during runtime, but it seems that“nl_abs_tol” has not been declared as a controllable variable. It seems that how to declare nl_abs_tol in transient as a controllable variable? I added params.declareControllable("nl_abs_tol"); in both FEProblemSolve.C and transient.c respectively, and after recompiling and running, the following error still occurs:

*** ERROR ***
The following error occurred in the object "func_control", of type "RealFunctionControl".

The desired parameter 'nl_abs_tol' was not located for the 'func_control' object, it either does not exist or has not been declared as controllable.

Thank you!

[GiudGiud]

Hello

you cannot use the Controls system to control convergence criteria.
However you can use the new Convergence system to have custom convergence criteria.
You might have to create a new object, I dont think we have a Function option for nl_abs_tol at this point