If the user simulates using the Scenario analysis with combination both Dnamic analysis and Eigenvalue analysis, then the default generated animation files (*.RAD and *.RAN) have only about Dynamic simulation. RecurDyn/solver provides additional animation files named “*EIG_0001.RAN” including mode shape animations of the Eigenvalue simulation. The 4-digit natural number of the file name is “0001” and means 1st defined Eigenvalue analysis. (If the scenario analysis has three Eigenvalue analysis command, the additional animation files are “*EIG_0001.RAN”, “*EIG_0002.RAN” and “*EIG_0003.RAN”.)