I keep getting the same error in MATLAB: "Arrays have incompatible sizes for this operation." For the script below, specifically the equations FissE and SepE. As far as I can tell, there is no incompatibility in "array" size. What is going wrong?

prompts $=\{\text{'}$Enter Reactant $1/$neutron mass $($in amu$)$:$\text{'}$; 'Enter Reactant $2$ mass $($in amu$)$:$\text{'}$; 'Enter Product $1$ mass $($in amu$)$:$\text{'}$; 'Enter Product $2$ mass $($in amu$)$:$\text{'}$; 'Enter Product $3$ mass $($in amu$)$:$\text{'}$; 'Enter original isotopic mass for separation calculation $($in amu$)$:$\text{'}$; 'Enter A$-1$ isotopic mass for separation calculation $($in amu$)$:$\text{'}\}$;

defaultValues $=\{\text{'}0\text{'},\text{'}0\text{'},\text{'}0\text{'},\text{'}0\text{'},\text{'}0\text{'},\text{'}0\text{'},\text{'}0\text{'}\}$;

inputValues $=$ inputdlg$($prompts$,$ 'Input', $1,$ defaultValues$)$;

R$1=$ inputValues$\{1\}$;

R$2=$ inputValues$\{2\}$;

P$1=$ inputValues$\{3\}$;

P$2=$ inputValues$\{4\}$;

P$3=$ inputValues$\{5\}$;

SER $=$ inputValues$\{6\}$;

SER$1=$ inputValues$\{7\}$;

FissE $=($R$1+$R$2-$P$1-$P$2-$P$3)*931$;

SepE $=(1\mathrm{.}008665+$SER$1-$SER$)*931$;

disp$(\text{'}$Calculated energy from fission event $($in MeV$)$:$\text{'})$

disp$($FissE$)$

disp$(\text{'}$Calculated separation energy $($in MeV$)$:$\text{'})$

disp$($SepE$)$