Fix : Error! Bookmark not defined in MS WORD

As we all know, creating the Table of Contents(TOC) section in MS word is easy with the Automatic Table feature. Also, it is a common practice to convert MS Word documents to PDF format while sending them over to someone. While converting the document, many of the users have reported that, in the Table of Contents (TOC) section, they see Error! Bookmark not defined instead of the Page Number corresponding to that field. Refer to the below screenshot for more details.


Toc With Error

The field named Tools to improve productivity displays Error! Bookmark not defined instead of the Page Number. In this article, we have compiled some fixes that will help you solve Error! Bookmark not defined.

Fix 1: Convert TOC to Static text

Try this fix only when all the above fixes don’t work.

Step 1: Click on the TOC

Step 2: Select all the Contents within TOC

Step 3: Press Ctrl+Shift+F9 at the same time.

Step 4: Now, you can see that the table is converted to Static text. Meaning, this is just a text and you can change it to whatever you want


Error Not Defined



Step 5: Delete the error message using the backspace button and manually enter the number of your choice.



Edited Table Of Contents

Fix 2: Make sure show bookmarks option is selected

1 – Open the particular Microsoft Word document.

2 – Click on File

3 – Click on Options from bottom left

Screenshot 2022 12 13 162007 Min


4  – Click Advanced from left menu

5 – Now, select Show bookmarks and click OK

Screenshot 2022 12 13 162150 Min

Fix 3: Restore your Changes using Undo

Are you seeing the error as soon as a TOC is generated? In that case, you might not have saved the document. Quickly, restore the changes.

Step 1: Click on the Undo. Alternatively, hold the Ctrl+Z key combination.


Undo In Ms Word



Step 2: Now that you know the action that caused the error, try fixing the bookmarks.

Step 3: Once all the corrupted bookmarks are fixed, create a PDF document.

Fix 4: Change the References

Step 1: Select the field that throws the error

Step 2: Right-click on that field

Step 3: Choose Toggle Field Codes from the context menu.


Toc Toggle Field Min



Step 4: Now, you will be able to see the field code as shown below



Hyper Link Will Be Displayed



Step 5: From the top menu bar( blue ribbon at the top), click on Insert

Step 6: Click on Links > Bookmark



Toc Bookmark Min



Step 6: In the Bookmark window that opens, Give this Hyperlink/Page Ref a name and click on Add



Adding The Bookmark


Step 7: Repeat the steps for all the fields with errors. Once all the corrupted bookmarks are fixed, create a PDF document.

That’s All

Fix 5: Update The TOC

When there are changes to Fields (Eg- Introduction or Tools to improve productivity), and the TOC is not updated, the error can be seen. Meaning, if the page number or the Heading format of the field has changed, and the TOC is not updated, there are chances of seeing this error.

Step 1: Click on the TOC

Step 2: Click on Update Table

Step 3: From the Update table of contents dialog  popping up, click on Update entire table

Step 4: Press on the OK button


Update Toc

That’ All

We hope this article has been informative. Thank you for Reading.

Kindly comment and let us know the fix that helped you solve the issue.

Stay Tuned for more Tips and tricks.