Problem with Matlab 2019b to access REFPROP10 trought Python 3.7.

I am using Matlab 2019b to access REFPROP10 trought Python 3.7 and I get the following message:

"Unable to resolve the name py.ctREFPROP.ctREFPROP.REFPROPFunctionLibrary".

The script I am using is the following:

close all
clear all
clc

%INPUT section start=========================================
gas='ARGON';
vapor='WATER';
yv=0.001;

T1=300; %K
p1=10e5; %Pa
p2=5.5e5; %Pa
%INPUT section end===========================================

yg=1-yv;
y=[yg,yv];
mix=sprintf("%s;%s",gas,vapor);

RP = py.ctREFPROP.ctREFPROP.REFPROPFunctionLibrary('C:\Program Files (x86)\REFPROP');
%r = RP.REFPROPdll(mix, "PTV","S",RP.MOLAR_BASE_SI,int8(0),int8(0),p1, T1,y);
UNITS = RP.GETENUMdll(int8(0),"MOLAR BASE SI").iEnum;
r = RP.REFPROPdll(mix, "PT","S",UNITS,int8(0),int8(0.),p1, T1,y);
o = double(r.Output);
s1=o(1); %(J/kg)/K
s2=s1;
r = RP.REFPROPdll(mix, "PS","T",UNITS,int8(0),int8(0),p2, s2,y);
o = double(r.Output);
T2=o(1); %K

From the NIST assistance, I have been answerd that the problem is in Matlab, since the following script, using python directly, works:

from ctREFPROP.ctREFPROP import REFPROPFunctionLibrary

gas='ARGON'
vapor='WATER'
yv=0.001

T1=300 #K
p1=10e5 #Pa
p2=5.5e5 #Pa

yg=1-yv
y=[yg,yv]
mix = gas+';'+vapor

root = 'D:/Program Files (x86)/REFPROP'
RP = REFPROPFunctionLibrary(root)
RP.SETPATHdll(root)
r = RP.REFPROPdll(mix, "PT","S",RP.MOLAR_BASE_SI,0,0,p1, T1, y);
print(r.Output[0])
s2=r.Output[0];
r = RP.REFPROPdll(mix, "PS","T",RP.MOLAR_BASE_SI,0,0,p2, s2, y);
print(r.Output[0])

Is there someone that can help me with this issue?

Thanks