Error while exporting pages from SharePoint using SP Designer

While opening Sharepoint pages containing webparts using SP Designer I was getting the following error message:
"This page cannot be edited in Sharepoint Designer. You can edit the content in the browser, or edit the corresponding page layout in Sharepoint designer."



Solution:

1. Open you Site Structure in SharePoint Designer


2. Right click on your page and select “Detach from page layout”


3. This will check the file out and right click again and select open > open with notepad


4. This will display the content you need to export. You can save it to chosen location