go to post Adrian Howe · Oct 18, 2023 Hi Cristiano, Thanks for your post. I think this code is working in principle, as I'm successfully getting the prefix concatenated to the encoded base 64 value for most PDF files that are processed. The problem seems to be with the base 64 encoding procedure not getting completed for a small number of PDF files, and therefore not getting output in OBX:5. On these occasions only the prefix "DOC^Application^PDF^Base64^" is output in OBX:5.