Compiler Error C0237

Message: No global definition found for VAR_EXTERNAL '<variable name>'

Possible error cause: An attempt is made to declare a variable in VAR_EXTERNAL which does not exist in VAR_GLOBAL.

Error correction: Make sure that the identifiers match.

Example 455. Example of the error:

PROGRAM PLC_PRG
VAR_EXTERNAL
    i : INT;
END_VAR

VAR_GLOBAL
    ig : INT;
END_VAR

Message:

C0237: No global definition found for VAR_EXTERNAL 'i'