Variable Not fully defined on some execution path error

99 views (last 30 days)
I have some code that is inside a simulink block that gets an error when it's compiled. It says a variable is not fully defined on some execution paths, but it's not true.
Here's a simplified version of the code:
function myfunc(logicA, logicB)
A = logicA;
B = logicB; % also input from the function
if A
X = 1;
elseif B
X = 2;
end
if (A || B)
Y = X;
end
It complies fine if I change it to
function myfunc(logicA, logicB)
A = logicA;
B = logicB; % also input from the function
X=2
if A
X = 1;
end
if (A || B)
Y = X;
end
It looks like the compiler doesn't realize that it doesn't need X if (A || B) is false?

Accepted Answer

Walter Roberson
Walter Roberson on 11 Mar 2021
disp(myfunc(1,1))
1
disp(myfunc(1,0))
1
disp(myfunc(0,1))
2
disp(myfunc(0,0))
Output argument "Y" (and maybe others) not assigned during call to "solution>myfunc".
function Y = myfunc(logicA, logicB)
A = logicA;
B = logicB; % also input from the function
if A
X = 1;
elseif B
X = 2;
end
if (A || B)
Y = X;
end
end

More Answers (0)

Categories

Find more on MATLAB Compiler in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!