If you observe a significant difference in loop test results, try using tighter force and displacement convergence criteria and an equal number of substeps to obtain matching results.

When used in an Inverse analysis, you must reverse the directions of any non-zero displacement and rotational boundary conditions (values must be equal to the negative value used in a regular forward-solving analysis). For more information, see Applying Loads in an Inverse-Solving Analysis in the Structural Analysis Guide.