I'm a beginner with Proj, so I just downloaded proj, and I'm using the OSGeo4W Shell and when I try to run the example
proj=molodensky a=6378160 rf=298.25 da=-23 df=-8.120449e-8 dx=-134 dy=-48 dz=149 abridged that is listed on the Proj website I get the error:
projection initialization failure
cause: invalid projection system error (-9999)
program abnormally terminated
I've tried looking up this error message but I can't find anything about it. Do I need to download something else to get the command to work? I'm on a Windows 10 computer.