Not able to generate a .asc file when converting netlist to ssc

I am trying to do the same thing that is mentioned in the youtube link. https://www.youtube.com/watch?v=O9Ee1ndVonI

when I run the convert.m file, I get the following error.

"Error using fieldnames

Invalid input argument of type 'string'. Input must be a structure or a Java or COM object.

Error in spiceSubckt/preparSimscapeFile

Error in subcircuit2ssc

Error in subcircuit2ssc (line 31)

subcircuit2ssc(netlist,target);

Error in convert (line 1)

subcircuit2ssc('CE_subcir.cir','+ce_amp_ckt'); "

The +ce_amp_ckt folder gets created but there is no .asc file in it.

Can someone help me on this?

Thanks