Code not working in APPDESIGNER...Only change is ifelse statement

R1=app.R1mmEditField.Value;

R2=app.R2mmEditField.Value;

L=app.LmmEditField.Value;

E1=app.ElasticModulusbody1Nmm2EditField.Value;

E2=app.ElasticModulusbody2Nmm2EditField.Value;

v1=app.PoissonsRatiobody1EditField.Value;

v2=app.PoissonsRatiobody2EditField.Value;

F=app.ForceEditField.Value;

if app.GEOMETRIESDropDown.Value=="CYLvsCYL"

% Defining geometrical parameters of Cylinder

%Calculating the contact half width

A=(4*F)/(3.14*L); Error using /Matrix dimensions must agree.

L1=(1/R1)+(1/R2);

Etot=(((1-v1^2)/E1)+((1-v2^2)/E2));

b=((A*Etot)/L1)^0.5;

%Calculating the pressure max

Pmax=2*F/(pi*b*L);

%Calculating the penetration depth;

app.PRESSUREMAXEditField.Value=Pmax;

app.EllipticalAxisEditField.Value=b;

elseif app.GEOMETRIESDropDown.Value=="SPHvsSPH"

%Calculating the contact half width

A=(3*F)/4;

Etot=(((1-v1^2)/E1)+((1-v2^2)/E2));

M=(1/R1)+(1/R2);

b=((A*Etot)/M)^(1/3);

%Calculating the pressure max

Pmax=(3*F)/(2*pi*b*b);

%Calculating the penetration depth;

%http://home.ufam.edu.br/berti/nanomateriais/8403_PDF_CH03.pdf

app.PRESSUREMAXEditField.Value=Pmax;

app.EllipticalAxisEditField.Value=b;

elseif app.GEOMETRIESDropDown.Value=="CYLvsPLATE"

%Calculating the contact half width

A=(4*F*R1)/(pi*L);

Etot=(((1-v1^2)/E1)+((1-v2^2)/E2));

b=(A*Etot)^0.5;

%Calculating the pressure max

Pmax=2*F/(pi*b*L);

%Calculating the penetration depth;

%http://home.ufam.edu.br/berti/nanomateriais/8403_PDF_CH03.pdf

%Below equation is valid only for steel..No equation is available

app.PRESSUREMAXEditField.Value=Pmax;

app.EllipticalAxisEditField.Value=b;

elseif app.GEOMETRIESDropDown.Value=="SPHvsPLATE"

%Calculating the contact half width

A=(3*F)/4;

Etot=(((1-v1^2)/E1)+((1-v2^2)/E2));

M=(1/R1)+(1/R2);

b=((A*Etot)/M)^(1/3);

%Calculating the pressure max

Pmax=(3*F)/(2*pi*b*b);

app.PRESSUREMAXEditField.Value=Pmax;

app.EllipticalAxisEditField.Value=b;

end

The error is as highlighted.

My question is why is a matrix variable formed .I can solve using ./ but it should be declared as a scalar right?