Property with invalid number of GET and/or SET blocks
Properties must be non empty and at most contain one block of type GET or SET.
Errouneus code example:
FUNCTION foo
PROPERTY bar : DINT
// Invalid, empty (no GET or SET block)
END_PROPERTY
PROPERTY baz : DINT
// Invalid, two GET blocks
GET END_GET
GET END_GET
END_PROPERTY
PROPERTY qux : DINT
// Invalid, two SET blocks
SET END_SET
SET END_SET
END_PROPERTY
END_FUNCTION