The data that drives the apps
2 posts • Page 1 of 1
Usually the cause for something like this is failure to verify a PDF file that has been downloaded from the internet. How do you verify a PDF? Look at the table of contents in the PDF itself and then check that all the pages are present and in the correct order and that includes pictures. If you have the physical book check it against that, if you don't, now would be a good time to buy it.
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