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I am running pdftotext on a bunch of pdfs, and some of them throw this error:

Error: Illegal entry in bfchar block in ToUnicode CMap

I took a look at the outfiles, and they seem to look ok, so I'm not sure if it's a significant error, but I am concerned. Does anyone know what this error is, what causes it, and how much damage there is because of it?

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up vote 2 down vote accepted

It appears to be having trouble converting a character to a unicode equivalent. I'm guessing it will cause little or no damage, and it's probably caused by an ASCII only encoded PDF.

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