I just discovered that one of my table has duplicate records. I am trying to know what is causing this.

The application using it only has one place in the code where a record can be inserted. That is based on a condition. If the LOCATE is NOT FOUND, then I will INSERT INTO table.

The code is like this:

SELECT LOGIN
LOCATE FOR NOMEMBER=lnNoMember AND NOCLIENT=lnNoClient
IF FOUND()
   do something
   ELSE
   INSERT INTO LOGIN (NOMEMBER,NOCLIENT,...) VALUES (lnNoMember,lnNoClient,...)
ENDIF

So, assuming the insertion of the duplicated record is done from here, it means the LOCATE fails. If that is the case, it would be because of an index corruption.

I was wondering if someone already had a situation like that. Or, if someone might have an idea what else can cause this.