PDF-XChange Drivers API (only) V4/V5
This Forum is for the use of Software Developers requiring help and assistance for Tracker Software's PDF-XChange Printer Drivers SDK (only) - VERSION 4 & 5 - Please use the PDF-Tools SDK Forum for Library DLL assistance.
I am not sure how this applies to the SDK, but when I take your OCR's PDF and save it as PDF/A-1b there is an option to "Rasterize unembedded fonts" if I turn that off I get a PDF/A-1b where the text can be selected.
The reason your result does not include the selectable text is that your original document has invisible text from the OCR. The Editor can select it and save as PDF/A-1b and retain the selectability of the text. Printing this invisible text results in nothing printed for that text which is why it cannot be selected.
The long and short of it is that reprinting is the root of the issue. You should use the Editor and/or Editor SDK to convert to PDF/A-1b not the printer.
This is a failing with any printer, not just ours. You already have an OCR'd PDF. Why reprint that and loose data? Better to just convert the PDF to PDF/A without using the printer. If you have large numbers of PDFs that yo need to convert to PDF/A I suggest using PDF-Tools to batch the process.
Both the Editor and PDF-Tools can do this for you without resorting to reprinting, so the editor SDK.