Message: 'VAR_CONFIG' declaration only allowed in VAR_CONFIG - list
Possible error cause: 'VAR_CONFIG' is used outside of a VAR_CONFIG list.
Error correction: Use 'VAR_CONFIG' only in VAR_CONFIG lists.
Example of the error:
PROGRAM PLC_PRG VAR_CONFIG i : INT; END_VAR --> C0168: 'VAR_CONFIG' declaration only allowed in VAR_CONFIG - list