(SQR 4407) Referenced variables not defined

There are 2 causes of this issue to occur.

1. Code between Begin-Select and End-select are not correctly formatted
or
2. check for variable which got error out, if the variable is referenced inside a procedure which have parameters (Called as function) and also referenced outside the issue occurs, the solution will be pass the referenced variable as parameter to the procedure.

Example for 2:

begin-select
----
----
    let $emplid=&emplid
----
----
end-select
do proc1($setid)


begin-procedure proc1($setid)
begin-select
----
---
where emplid = $emplid and setid=$setid
----
end-select
end-procedure

should be changed as below

begin-select

----

----

    let $emplid=&emplid

----

----

end-select

do proc1($setid,$emplid)

begin-procedure proc1($setid,$emplid)

begin-select

----

---

where emplid = $emplid and setid=$setid

----

end-select

end-procedure