SAP2000 API and MATLAB: problem obtaining natural frequencies and mode shapes

[jfmelo]

Hi, everyone!

I'm working with SAP2000 API and MATLAB.

I need to obtain the Mode Shapes and Natural Frequencies from my models, but the folowing functions just not work:

ret = Sap.Results.ModalPeriod('NumberResults', 'LoadCase', 'StepType', 'StepNum', 'Period', 'Frequency', 'CircFreq', 'EigenValue')

No method 'ModalPeriod' with matching signature found for class
'Interface.020E9225_C884_4E04_ABD2_B91D15E6A45B'.

ret = SapModel.Results.ModeShape('ALL', 'GroupElm', 'NumberResults', 'Obj', 'Elm', 'LoadCase', 'StepType', 'StepNum', 'U1', 'U2', 'U3', 'R1', 'R2', 'R3')

No method 'ModeShape' with matching
signature found for class
'Interface.AE8687D5_D338_4322_B938_BD2A81649AFD'.

Did those functions had their names changed or something? Is there another way to obtain those informations interactively?

I appreciate any help