AutoForm Plus R7 Update 4 AutoForm Engineering GmbH, the leading provider of software solutions for the sheet metal forming industry, has released an update 4 to AutoForm plus R7, which provides a new set of powerful features to support users around the Sheet metal processing chain. These Release Notes describe the Fixed Bug of AutoFormplus R7.0.4 Stand-alone: With the AutoFormplus R7.0.4 patch a significant bug in AutoForm-Solverplus has been fixed. This bug led to wrong simulation results when kinematic hardening was used for material definition and at the same time the control parameter Thickness Stress was activated. Fixed Bugs: Solver Due to a solver bug found in R7.0.3, it is not recommended to use Kinematic Hardening in combination with Thickness Stress. When using such combination, in most of the cases, thinning of the material is overestimated which leads to wrong prediction of splits. Effects of the bug become obvious when forming material over sharp tool radii, i.e. in situations with high in-plane strains and high contact stresses. To demonstrate the effects of the bug, results after simulation of drawing operation of a hood inner are shown below. Two simulations are run with Kinematic Hardening ON/OFF and activated Thickness Stress. Hood inner includes multiple features with small radii. These features are formed at the end of the operation without considerable material flow over the radius. Therefore one would expect comparable results when running the simulation with Kinematic Hardening ON or OFF. However, this is clearly not the case. Simulation with Kinematic Hardening ON predicts much higher level of strains and indicates material splitting at the end of the process. The bug was fixed in R7.0.4 leading to more realistic prediction of splits in simulations with Kinematic Hardening and Thickness Stress ON. In all other cases results calculated in R7.0.3 should be identical to R7.0.4.