INVALID_LABEL_USAGE error condition
The usage of the label <labelName> is invalid.
DOES_NOT_EXIST
Label was used in the <statementType> statement, but the label does not belong to any surrounding block.
ITERATE_IN_COMPOUND
ITERATE statement cannot be used with a label that belongs to a compound (BEGIN...END) body.
QUALIFIED_LABEL_NAME
Label cannot be qualified.