Command.Parameters.Add("AccountCode", OdbcType.VarChar, 10);
Command.Parameters["AccountCode"].Value = accountCode;

DA.Fill(DS);    <<<<< Error occurs here….

if (DS.Tables.Count > 0)
{
DataTable UserTable = DS.Tables[0];

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 Comments

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The problem had to do with the ODBC driver not being updated properly for 64-bit. In addition to normal pointers changing size, the ODBC 3.x spec for 64-bit included many changes to API parameter sizes that were not originally taken into account with the 64-bit update. This would cause all sorts of random and confusing errors, depending upon the client application being used.

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 Resolution

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Fixed Problem on 4/30/2012 in version 4.33 build 1

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 Products Affected

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DBISAM ODBC Client-Server
DBISAM ODBC Client-Server with Source
DBISAM ODBC Standard
DBISAM ODBC Standard with Source
DBISAM ODBC Trial