Syntax error in function handling

I dont understand this error ! Can any one help me ?

??? Output argument "segimage" (and maybe others) not assigned during call to "C:\Users\Shahd\Documents\MATLAB\gp.m>segm".

Error in ==> gp at 10 im=segm( hueThreshLow,hueThreshHigh);

Answer 1

[Walter Roberson]

Your routine "segm" in file "gp.m" starts with

function segimage = segm(.... something )

but under at least some conditions, it does not assign any value to "segimage".