在插入數據的時候出錯

ERROR [HY000] [Informix .NET provider][Informix]User Defined Routine error. sqlerrm(mat_spec_desc_t)[U0000]CISAMDB:  Error in iswrite! errno= 100, file=isinsert.c, line=83執行到cmd.ExecuteNonQuery();時出錯
 public bool ExecuteCommand(IfxConnection conn, ArrayList sqls)
        {
            bool flag = false;
            int count = 0;
            this.open(conn);
            IfxCommand cmd = new IfxCommand();
            cmd.Connection = conn;
            count = sqls.Count;
            try
            {
                if (count > 0)
                {
                    for (int i = 0; i < count; i++)
                    {
                        cmd.CommandText = sqls[i].ToString();
                        sLog.doLog("sql:" + sqls[i].ToString(), 1);
                        cmd.ExecuteNonQuery();
                    }
                    flag = true;
                }
            }
            catch (Exception e)
            {
                sLog.doLog(e.StackTrace.ToString(), 1);
                throw (e);
            }
            finally
            {
                close(conn);
            }
            return flag;
        }