Software for automatic calibration of three-dimensional frame structures. Based on the Finite Element Method, it performs modal analyzes by varying geometric and mechanical parameters and supports. These data are then compared to the experimental modal parameters, and from optimization techniques the properties that best fit the data are set. Feature: • Developed under Linux environment; • Optimized algorithms that allow you to perform a large amount of floating-point operations efficiently; • Implementation for three-dimensional bar elements; • Allows scanning of the following properties per element, jointly and/or individually: longitudinal and transverse elastic module; area and inertia (major, minor and torsion) of section; additional masses; joints (transverse and rotational rigidity);