DAO Object invalid or no longer set

[WannaKatana]

This is such a simple basic thing I've done for decades yet now a problem? I'm sure it's something silly I'm missing. A search provides no answer for my situation.
Library reference is to Microsoft Office 16.0 Access database engine object library. I removed that and changed it to DAO 3.6 library. Both compiled. Both gave me the same error.

 Dim db As DAO.Database
    Dim rs As DAO.Recordset

    Set db = CurrentDb
    Set rs = db.OpenRecordset(strSQL)
   
    strElig = rs("Elig")  -- This works!
   
    Do Until rs.EOF  -- error occurs here! Grrrr!
   
        rs.movenext
    loop

EOF is false before that value is accessed and assigned to the variable.
After the value is assigned, the variable has the correct value "BS".
I get a record count from the RS object before the error.
I can movelast, movefirst.
Only after it assigns this value do I get the error at "Do Until rs.eof".

[westconn1]

if you movefirst after editing the record, does the loop work?

[WannaKatana]

Right after I get the value from the record, the RS is invalid. I tried movefirst before accessing the value, it worked, but still got the error.