Errors occurred during parsing of MATLAB function 'MATLAB Function'(#24)

I'm trying to run SPIHT algorithm without arithmetic coding with Matlab function block, the whole code is attached, and error list shown the following errors:

Expected either a logical, char, int, fi, single, or double. Found an mxArray. MxArrays are returned from calls to the MATLAB interpreter and are not supported inside expressions. They may only be used on the right-hand side of assignments and as arguments to extrinsic functions.

Function 'MATLAB Function' (#25.2051.2057), line 82, column 26: "Orig_I" Launch diagnostic report. Component: MATLAB Function | Category: Coder error

 Undefined function or variable 'MSE'. The first assignment to a local variable determines its class.

Function 'MATLAB Function' (#25.2138.2141), line 83, column 59: "MSE" Launch diagnostic report. Component: MATLAB Function | Category: Coder error

 Errors occurred during parsing of MATLAB function 'MATLAB Function'(#24)
Component: MATLAB Function | Category: Coder error

 Code Directory :
     "C:\Users\hanaa\Documents\MATLAB\slprj\_sfprj\spiht_try\_self\sfun\src"

Machine (#21): "spiht_try" Target : "sfun"

Chart "MATLAB Function" (#24):

. Code generation failed Errors occurred during parsing of MATLAB function 'MATLAB Function'(#24)

please help. thanks.

[hanaa]

the code attached here.