Compiler Warning C0441
Message: Access to uninitialized VAR_IN_OUT variable
Possible error cause: A VAR_IN_OUT variable is used as the initial value of another variable declaration.
Error correction: Remove the initial value and assign the value to the variable in the implementation part.
Example 477. Example of the warning
FUNCTION_BLOCK POU VAR_INPUT i:INT; END_VAR VAR_OUTPUT b:BOOL := a[i]; END_VAR VAR_IN_OUT a:ARRAY [1..5] OF BOOL; END_VAR
The initial value of the variable b produces the following warning.
Message:
C0441: Access to uninitialized VAR_IN_OUT variable