Actually I have
//REQUIRED: Ghostscript binary
define('GS_BIN', "C:\Program Files\gs\gs8.60\bin\gswin32c.exe");
//OCR requires CONVERT_BIN (imagemagick convert binary) and TESSERACT_BIN (tessearct binary) to be enabled
but for some reason the strings are empty and moreover they are skipped by the debugger. I do not know why it is happening because without that nothing gets done.
I tried to put them as environment variable and also as relative to the website root but none worked