Unfortunately there are lots of different things that can cause crashing behavior.
Here is a list of things you could try:
- Check that you have the latest version of InDesign CS6 installed. Help > About InDesign (should be 8.0.2) - Adobe - InDesign : For Windows : Adobe InDesign CS6 8.0.2 update - All Languages
- Save the document as an InDesign IDML file, and reopen that IDML file in InDesign, then save it as an InDesign file again.
- Create a copy of the InDesign document and try opening that and adding a new page.
- In the open InDesign document before adding a page: Edit > Preferences > Type, deselect the Smart Text Reflow option.
- Delete cache files (see: InDesign preferences and support files locations page)
- Rename InDesign preferences file (or delete).
- Disable/Uninstall any third party plug-ins that are installed, and check that any third party plug-ins or extensions that are installed are compatible with the InDesign version used (depending on how they are installed you could do this from the Adobe Extension Manager application - see http://helpx.adobe.com/extension-manager.html).
If all of this fails, you might need to try and isolate which object in your document is causing the crash. That's generally a time-consuming task, but hopefully one or some of the above combined will provide you with a fix.
Thank you for all your suggestions.
I realized after a while that it was only one document that was "buggy.
I tried to solve the problem by creating a new empty document and then copied the data from the distorted
file, two pages at the time, and pasted it into the new document.
It worked. It is solved!