Backward Compatibility with Version 4.3b

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If an old model using the Beam interface is opened, the Euler-Bernoulli formulation is used. The Beam Formulation selection is still shown but cannot be changed from Euler-Bernoulli. If Advanced Physics Options is enabled, then the new section Backward Compatibility is shown. If you clear the Use pre 4.4 formulation check box, then the new formulation is used. Doing this enables the use of Timoshenko beams, but you must manually handle solver settings like segregation and scaling. This legacy option does not support beams mixed with solids or shells in cases where the same names for degrees of freedom were used in both physics interfaces.

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For models using mechanical contact, plot expressions are not updated when you open an old model where the pair names have been edited manually. Also, opening an old model where a pair name has been manually edited might affect the solver configuration. It is recommended that you regenerate a new default solver configuration.