How to overcome ICC profile warning & export an ID file to PDF

Hey I struggled with this for a bit. Went through the advice other people gave and still had issues. Some of my ICC desginations were just blank in my links panel so I couldn't figure out if those were tripping me up. Simplest solution for me was to go to export and when you get the dialog export box go to Output on the left hand side, you'll see an option for Color Conversion: click on the drop down box and select Convert to Destination. Hope this helps. 

Narrowing down to step by step helped to solved the problem - thank you @rob day 

I managed to fix this issue. To do it I located the problem page by exporting the first half, then the second half and kept splitting the page range until I found the offending page. I then deleted 1 image and exported the page again, and repeated this for each image, until I was able to export without error, meaning that last image I deleted was the problem. I'm not sure what caused the issue, many of my other images were in RGB, but this one was different. Anyhow, in photoshop I changed the image to a CMYK profile, and placed this back into the document. I then exported the whole document and had no more errors.

Just to go a little further on this problem and for anyone else who's experiencing it and finds this thread, the ICC Profile warning usually occurs when you have an RGB image placed in a CMYK document. Fortunately, in InDesign, you can choose to view an ICC Profile column in the Links Panel. Go to the Links panel, in the pull down menu, scroll down and select Panel Options... In the Panel Options pop up window, select ICC Profile under Show Column. In the same Panel Options window, you can also select Color Space. This will tell you if an image is CMYK or RGB without having to look at each image's Link Info. Hope this helps future troubleshooters.

Version 4 ICC profiles will generate the warning on export. It doesn‘t have an affect on color conversions so you can usually safely ignore the warning.