# Newton convergence could not be reached¶

Error

**Newton convergence could not be reached. Possible options to prevent that behavior: Update the tangent matrix more often, increase the maximum number of
iterations, use automatic timestepping or decrease the timestep.**

## What happened?¶

The solution diverged since no convergence could be reached under specific nonlinear Newton iterations.

## What could be the possible reason?¶

This error may occur when solver failed to converge the solution under specific nonlinear Newton iterations while solving a nonlinear problem. The possible reason
could be either the convergence criteria is quite strict or **Maximum Newton iterations** are to less to converge.

## What can I do now?¶

To resolve this error, please do the following steps:

- Increase the
**Tolerance**of the convergence criteria under**Numerics**. For example, rather than 1e-6 give 1e-3. Please note, by doing this may result in less precise solution.

- Increase
**Maximum Newton iterations**under**Numerics**.

- Update tangent or elastic matrix more often. For example, set
**Reactualisation every nth increment**or**Reactualisation every nth iterations**to 1 rather than 3.

- Use automatic
**Timestep definition**rather than manual under**Simulation Control**.

Note

If none of the above suggestions did solve your problem, then please post the issue on our forum or contact us.