The code below shows that a record is deleted when the sql statement is:

select * from test where qty between 50 and 59  

but the sql statement:

select * from test where partno like 'PART/005%'

throws the exception:

Advantage.Data.Provider.AdsException: Error 5072:  Action requires read-write access to the table

How can you reliably delete a record with a where clause applied?
Note: I'm using Advantage Database v9.10.1.9, VS2008, .Net Framework 3.5 and WinXP 32 bit

using System.IO;
using Advantage.Data.Provider;
using AdvantageClientEngine;
using NUnit.Framework;

namespace NetworkEidetics.Core.Tests.Dbf
{
  [TestFixture]
  public class AdvantageDatabaseTests
  {
    private const string DefaultConnectionString = @"data source={0};ServerType=local;TableType=ADS_CDX;LockMode=COMPATIBLE;TrimTrailingSpaces=TRUE;ShowDeleted=FALSE";
    private const string TestFilesDirectory = "./TestFiles";

    [SetUp]
    public void Setup()
    {
      const string createSql = @"CREATE TABLE [{0}] (ITEM_NO char(4), PARTNO char(20), QTY numeric(6,0), QUOTE numeric(12,4)) ";
      const string insertSql = @"INSERT INTO [{0}] (ITEM_NO, PARTNO, QTY, QUOTE) VALUES('{1}', '{2}', {3}, {4})";
      const string filename = "test.dbf";

      var connectionString = string.Format(DefaultConnectionString, TestFilesDirectory);

      using (var connection = new AdsConnection(connectionString)) {
        connection.Open();

        using (var transaction = connection.BeginTransaction()) {
          using (var command = connection.CreateCommand()) {
            command.CommandText = string.Format(createSql, filename);
            command.Transaction = transaction;
            command.ExecuteNonQuery();
          }

          transaction.Commit();
        }

        using (var transaction = connection.BeginTransaction()) {
          for (var i = 0; i < 1000; ++i) {
            using (var command = connection.CreateCommand()) {
              var itemNo = string.Format("{0}", i);
              var partNumber = string.Format("PART/{0:d4}", i);
              var quantity = i;
              var quote = i * 10;

              command.CommandText = string.Format(insertSql, filename, itemNo, partNumber, quantity, quote);
              command.Transaction = transaction;
              command.ExecuteNonQuery();
            }
          }
          transaction.Commit();
        }

        connection.Close();
      }
    }

    [TearDown]
    public void TearDown()
    {
      File.Delete("./TestFiles/test.dbf");
    }

    [Test]
    public void CanDeleteRecord()
    {
      const string sqlStatement = @"select * from test";

      Assert.AreEqual(1000, GetRecordCount(sqlStatement));
      DeleteRecord(sqlStatement, 3);
      Assert.AreEqual(999, GetRecordCount(sqlStatement));
    }

    [Test]
    public void CanDeleteRecordBetween()
    {
      const string sqlStatement = @"select * from test where qty between 50 and 59";

      Assert.AreEqual(10, GetRecordCount(sqlStatement));
      DeleteRecord(sqlStatement, 3);
      Assert.AreEqual(9, GetRecordCount(sqlStatement));
    }

    [Test]
    public void CanDeleteRecordWithLike()
    {
      const string sqlStatement = @"select * from test where partno like 'PART/005%'";

      Assert.AreEqual(10, GetRecordCount(sqlStatement));
      DeleteRecord(sqlStatement, 3);
      Assert.AreEqual(9, GetRecordCount(sqlStatement));
    }

    public int GetRecordCount(string sqlStatement)
    {
      var connectionString = string.Format(DefaultConnectionString, TestFilesDirectory);
      using (var connection = new AdsConnection(connectionString)) {
        connection.Open();

        using (var command = connection.CreateCommand()) {
          command.CommandText = sqlStatement;
          var reader = command.ExecuteExtendedReader();
          return reader.GetRecordCount(AdsExtendedReader.FilterOption.RespectFilters);
        }
      }
    }

    public void DeleteRecord(string sqlStatement, int rowIndex)
    {
      var connectionString = string.Format(DefaultConnectionString, TestFilesDirectory);
      using (var connection = new AdsConnection(connectionString)) {
        connection.Open();

        using (var command = connection.CreateCommand()) {
          command.CommandText = sqlStatement;

          var reader = command.ExecuteExtendedReader();

          reader.GotoBOF();
          reader.Read();

          if (rowIndex != 0) {
            ACE.AdsSkip(reader.AdsActiveHandle, rowIndex);
          }
          reader.DeleteRecord();
        }

        connection.Close();
      }
    }
  }
}