我遇到了同样的问题，但我是动态生成表。在我的例子中，我的表缺少<thead>和<tbody>标签。

下面是我的代码片段，如果它对某人有帮助的话

   //table string
   var strDiv = '<table id="tbl" class="striped center responsive-table">';

   //add headers
   var strTable = ' <thead><tr id="tableHeader"><th>Customer Name</th><th>Customer Designation</th><th>Customer Email</th><th>Customer Organization</th><th>Customer Department</th><th>Customer ContactNo</th><th>Customer Mobile</th><th>Cluster Name</th><th>Product Name</th><th> Installed Version</th><th>Requirements</th><th>Challenges</th><th>Future Expansion</th><th>Comments</th></tr> </thead> <tbody>';


  //add data
  $.each(data, function (key, GetCustomerFeedbackBE) {
                            strTable = strTable + '<tr><td>' + GetCustomerFeedbackBE.StrCustName + '</td><td>' + GetCustomerFeedbackBE.StrCustDesignation + '</td><td>' + GetCustomerFeedbackBE.StrCustEmail + '</td><td>' + GetCustomerFeedbackBE.StrCustOrganization + '</td><td>' + GetCustomerFeedbackBE.StrCustDepartment + '</td><td>' + GetCustomerFeedbackBE.StrCustContactNo + '</td><td>' + GetCustomerFeedbackBE.StrCustMobile + '</td><td>' + GetCustomerFeedbackBE.StrClusterName + '</td><td>' + GetCustomerFeedbackBE.StrProductName + '</td><td>' + GetCustomerFeedbackBE.StrInstalledVersion + '</td><td>' + GetCustomerFeedbackBE.StrRequirements + '</td><td>' + GetCustomerFeedbackBE.StrChallenges + '</td><td>' + GetCustomerFeedbackBE.StrFutureExpansion + '</td><td>' + GetCustomerFeedbackBE.StrComments + '</td></tr>';
                        });

//add end of tbody
 strTable = strTable + '</tbody></table>';

//insert table into a div                 
   $('#divCFB_D').html(strDiv);
   $('#tbl').html(strTable);


    //finally add export buttons 
   $('#tbl').DataTable({
                            dom: 'Bfrtip',
                            buttons: [
                                'copy', 'csv', 'excel', 'pdf', 'print'
                            ]
                        });

我有一个动态生成的，但格式糟糕的表，有一个错字。我错误地在另一个<td>内复制了一个<td>标签。列数匹配。我有<thead>和<tbody>标签。所有内容都匹配，除了这个我一时没有注意到的小错误，因为我的专栏中有很多链接和图像标签。

我在通过脚手架生成器创建的Rails视图中使用DOM数据时遇到了同样的问题。默认情况下，视图为最后三列(包含显示、隐藏和销毁记录的链接)省略<th>元素。我发现，如果我在<thead>内的<th>元素中为这些列添加标题，它就解决了这个问题。

I can't say if this is the same problem you're having since I can't see your html. If it is not the same problem, you can use the chrome debugger to figure out which column it is erroring out on by clicking on the error in the console (which will take you to the code it is failing on), then adding a conditional breakpoint (at col==undefined). When it stops you can check the variable i to see which column it is currently on which can help you figure out what is different about that column from the others. Hope that helps!

我可能是由acolumns字段产生的。如上所述

aocolcolumns:如果指定了，则该数组的长度必须相等 到原始HTML表中的列数。在此处使用“null” 您希望只使用默认值并自动检测 选项。

然后必须像在Columns表中一样添加字段

...
aoColumnDefs: [
    null,
    null,
    null,
    { "bSortable": false },
    null,
],
...

有<thead>和<tbody>与<th>和<td>相同的数字解决了我的问题。

在我的例子中，这个错误的原因是我有两个具有相同id名称但表结构不同的表，因为我习惯复制-粘贴表代码。请确保每张桌子有不同的id。

<table id="tabel_data"> <thead> <tr> <th>heading 1</th> <th>heading 2</th> <th>heading 3</th> <th>heading 4</th> <th>heading 5</th> </tr> </thead> <tbody> <tr> <td>data-1</td> <td>data-2</td> <td>data-3</td> <td>data-4</td> <td>data-5</td> </tr> </tbody> </table> <table id="tabel_data"> <thead> <tr> <th>heading 1</th> <th>heading 2</th> <th>heading 3</th> </tr> </thead> <tbody> <tr> <td>data-1</td> <td>data-2</td> <td>data-3</td> </tr> </tbody> </table>