#38375

Hi! I guess you currently own PD4ML license, which assumes only regular PDF output. PDF/A-b support requires PD4ML DMS license, PDF/A-a and PDF/UA requires PD4ML UA license.

See https://pd4ml.com/products/

You can easily upgrade to the above version by paying the difference in license price (if your maintenance period is still active).
There is no need to replace the PD4ML binaries, you only need to apply a new license code with the required features enabled.