Description: The constraint solver used in the Sketcher for the last several releases has been replaced. The new solver may show some different behavior in its solution of a desired constraint compared to the previous one. When you are creating a new sketch for a part, these differences should be inconsequential. For example, if you change the length dimension of a block, the new solver may adjust the right edge to achieve the desired value, whereas the old one may have adjusted the left edge. When you upgrade a model that was created in a previous Abaqus release, consider fully constraining your sketches in the old release first to avoid any potential for changes.

If you have sketches that are generated via scripts, the generated entities should be identical to those created in previous releases. However, their exact location may change due to the addition of constraints using the new solver. If the commands in those scripts use indices, the scripts may execute without any issues. However, you should check the sketch to ensure the desired solution. If those scripts use the findAt scripting command to locate the generated entities and perform further operations, you may need to modify the entities within the sketch so that they will be found by the command.

Sketcher or Sketch module:
    Add constraints or dimensions to an existing or new sketch