This field name is not known. Details: errorKindError

This works for most of my reports..

for
 (int i = 0; i < theReport.Database.Tables.Count; i++)
{    myTable = theReport.Database.Tables[i];    myLog = myTable.LogOnInfo;    myLog.ConnectionInfo.UserID = "user";    myLog.ConnectionInfo.Password = "password";    myTable.ApplyLogOnInfo(myLog);    myTable.Location = myLog.TableName;
 }

But one of my reports (attached) gives:

          This field name is not known.
          Details: errorKindError in File

If I add -1 to this line:

for
 (int i = 0; i < theReport.Database.Tables.Count-1; i++)

then the attached report works.. but then all of my other working reports quit working..

What is going on?

VS2012 with CRforVS 13.0.5 coded in C#

I tried switching it to this, but got the same errorKindError.. but other reports work fine.

foreach
 (CrystalDecisions.CrystalReports.Engine.Table myTable in theReport.Database.Tables)