Some EQUEL statements generate labels in the output code. If you include a file containing such statements, you must be careful to include the file only once in a given Pascal scope. Otherwise, you may find that the compiler later issues Pascal warning or error messages to the effect that the generated labels are multiply defined in that scope.

The statements that generate labels are the retrieve statement and all the EQUEL/FORMS block-type statements, such as display and unloadtable.