The page probably is nothing more than a picture of text. This will happen if the page is a scan of printed text.
No. It is a PDF scan of text. It is not a picture of text. I know the feature will not read pictures.
I scanned a document yesterday and saved as a PDF. The feature read pages from half of the document just fine. The other half it was giving me that message wheather the page had all text or text in a chart.
I have the same issue when the document is over 50 pages. I was told to change the read out loud settings to read entire document. Hope that helps.