SQL VBA code failing on opening recordset

Can someone please tell me what is wrong with this statement? It keeps giving me "object or with variable not set":
 Dim rs1                     As ADODB.Recordset
 Dim strSQL1             As String


            Set rs1 = New ADODB.Recordset
            rs1.Open strSQL1, mConn
            Do Until rs1.EOF        *** Fails here.

I have written this code thousands of times and never had it fail.
smm6809Asked:
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Rey Obrero (Capricorn1)Commented:
you did not provide information for the variable "mConn"

 Dim rs1                     As ADODB.Recordset
 Dim strSQL1             As String
dim mConn as  adodb.connection

set mConn="< connection string  here >"


            Set rs1 = New ADODB.Recordset
            rs1.Open strSQL1, mConn
            Do Until rs1.EOF
smm6809Author Commented:
mConn is the adodb connection. I use it throughout the application. I tested it had the connection was ok.
Rey Obrero (Capricorn1)Commented:
check if you have missing reference
from VBA window
Tools > References

also, do  a Debug > Compile
correct any errors raised
Rey Obrero (Capricorn1)Commented:
and don't forget to do a compact and repair

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