Just another option

I monitor the mirror status from a background job in %SYS and this outputs various server details it uses the %SYSTEM.Mirror class.

https://docs.intersystems.com/latest/csp/documatic/%25CSP.Documatic.cls?...

Just for information,  no need to download zlib as the CSP gateway installs it. This issue was down to a  dependency issue on windows 2012 as a result I had to install "MS VC++ 2013 redistributable". Thanks to Bernd Mueller as Intersystems wrc.

Just noticed the inetpub\cspgatway directory contains a zlib1.dll, I have therefore copied this to zlib.dll based on the documentation but still no luck. Did you use the version from zlib or the version in the csp gateway and can you confirm the name of the file.

Cheers

Gary