Exporting InDesign File as a pdf

I tried using acrobat to open it and it was still blank. I know the transparency blend space is correct because that notification doesn't pop up anymore but it still saves blank. I even double checked by making a new socument with the same files on it and that exported fine so that means that I have a document specific corruption? It's strange though because it's on 2 documents I have been working on.

I have been trying to export my indesign file for over an hour and sometimes i get a pop up window saying the "the document's transparency blend space doesnt match the destination color space specified in the export adobe pdf..."

You'll get the mismatch dialog when the document's transparency blending space conflicts with the Destination profile mode you set in the Export>Output tab—i.e., if your blending space is set to CMYK and your Output>Destination is set to sRGB.

With the default PDF/X-4 preset you would never get the dialog because its default setting is No Color Conversion. In any case the conflict wouldn't produce a blank document, it's just a warning that there might be a change in color appearance in the PDF.

As Derek suggests try making a new document with a few simple page items and see if it exports correctly. If that's the case you might have a document specific corruption that's causing the export to fail. If you can't get any document to export try resetting your preferences.

What software do you view your PDF with?

InDesign asking about the transparency space suggests you are using this somewhere. As you are on a Mac: are you perchance using OS X Preview to view your PDFs with? This does not support live transparency in PDFs.

Use Acrobat Reader (no worries: it's free!), unless you are firmly wedded to use Preview, in which case you are probably best off with exporting as the lowest PDF version possible, which will flatten all transparent items. (And that can lead to a subtly different output, so think it through.)

Which version of InDesign and OS?

Which InDesign Acrobat PDF Preset have you selected?