SAM SDK automation using Matlab

I am trying to automate a solar power tower (SPT) model in Matlab using the SDK.

My goal is to loop the SPT model multiple times using an array of inputs for some variables, e.g. c_atm_0. 

I modified the already existing command based on one single value as follows:
a0= [-0.000558728];
ssccall('data_set_number', data, 'c_atm_0', a0);
    
To a command which I thought can take an array of values as follows:
a0= [-0.000558728;     -0.000347126; -6.89E-05;   4.73E-05];
ssccall('data_set_array', data, 'c_atm_0', a0);
    
However, I got this message in the Matlab command window:
precheck input: variable 'c_atm_0' (<array>) of wrong type, <number> required.

Can you please help me change this single value based set up in order for the model to accept multiple values.

Thanks in advance.

Regards,
Mohammed

Dear Mr. Gilman,

Thanks a lot for your reply, I really appreciate your help and support.

Thanks for the confirmation, I believe I have a better understanding now.

Thanks a lot.

Regards,
Mohammed