MATLAB+SAP 2000: SetLinear command does not work

[Bruce_Qi]

Hello!

I've been trying to change the properties of an existing linear link in SAP2000 using the API and MATLAB

I'm trying this in MATLAB:

DOF=[true;true;true;true;true;true];
Fixed=[false;true;true;true;true;true];
Ke = zeros(6,1,'double');
Ce = zeros(6,1,'double');
Ke(1) =32987;
PropLink = NET.explicitCast(SapModel.PropLink,'SAP2000v1.cPropLink');
ret = PropLink.SetLinear('riseup', DOF, Fixed, Ke, Ce, 0.5, 0);
if ret~=0
disp('SapModel.PropLink.SetLinear :this command is wrong!');
end

But it doesn't work! I get ret =1, meaning that there is something wrong with the input arguments.

Really really appreciate it if you could provide me with some suggestions.