> I Have installed postgresql 16.4 &16.3 on HP UX B.11.31 U ia64. Installation is successful but when i am doing physical replication i m getting Libpq error and sync not starting, unable to connect to primary server. Kindly check the screenshot below
HP UX support was dropped in PG16 according to the release notes [1]:
> Remove support for HP-UX (Thomas Munro)
I'm afraid you will have to ask for help somebody who provided this build for you.