227 pg ID file won't export to a PDF

Here are some suggestions...

As I general process, I would rebuild the preferences (Mac: hold down Cmd-Cntl-Opt-Shift immediately upon start; Windows hold down Cntl-Alt-Shift). See if it makes any difference.

Use the Window>Utilities>Background tasks to watch progress of the PDF export. See what page it seems to hang at. Try exporting just the pages before the problem page and all the pages after the problem page. Then see if the problem page will output on its own.

You can try putting all the graphics on their own layer, hide that layer, then export. That will tell you if it is a graphics problem or a font problem. Also try exporting another document to make sure it is not an InDesign problem (like an install glitch).

Another method is the binary (50/50) method. Export pages 1-113 and see if it works; then output 114-227 to double check that it works. Let's assume, for example, the first section failed and the second worked. Then split the fist section into two parts--1-66 and 67-113. Repeat splitting the problem section in half until you track down the problem page. (This method goes quicker than it appears...)

What version of ID? What operating system? What happens when you export? What are your export settings?