Exporting Load functions applied in COMSOL to MATLAB

I want to export the edge load function data I applied in SOLID MECHANICS physics to MATLAB.

I found the name as "solid.FperLengthy".

When I try to extract data with help of "mpheval(model,'solid.FperLengthy')"; MATLAB doesn't recognize the variable and giving me error as undefined variable.

Would anyone please help me in this? How can I extract the data from physics to the MATLAB??

Thanks in advance.