error 3061

I have a simple update query, run from a form but does not contain form references, just table.fields.  This runs fine in my test environment but fails when I run it in the production environment.  I don't know of any difference in the two environments that would be related to this error (obviously, I'm missing something).   A very similar query runs fine just before this one.  I've tried removing the Where clause but the error  (3061, Too few Parameters, Expected 1) still occurs.  
Any suggestions will be greatly appreciated.
Thanks,
Brent

'Update table from imported data
   strSQL = "UPDATE [RouteCards_temp]" & _
         " INNER JOIN StreetSyncOutput ON [RouteCards_temp].iCustId  = StreetSyncOutput.CustomerNumber" & _
         " SET [RouteCards_temp].Sequence = StreetSyncOutput.Sequence," & _
         " [RouteCards_temp].StopSequence = StreetSyncOutput.StopSequence" & _
         " [RouteCards_temp].RouteName = StreetSyncOutput.RouteName" & _
       " WHERE  RouteCards_temp.icustid > 0 ;"
         
   db.Execute strSQL, dbFailOnError

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