Someone might run into this problem so I’ll share the solution with you.
Starting Partha’s " Standart Edition" portable build of “Gimp 2.10 RC1” in Windows 10 64 throws the following error message:
“The procedure entry point g_getnv could not be located
in the dynamic link library …\bin\libgimp-2.0-0.dll”.
The error shows up while GIMP is initializing the GMIC plugin. After clicking “OK” gimp starts and the GMIC-plugin is accessable and seems to work fine - at least the filters that I have tried.
To get rid of this error message (I don’t know if the error influences the correct working of the GMIC-plugin) replace the folder …\Gimp-2.10.0-std-64bit-portable\Gimp-2.10-std\portable\plug-ins\gmic-gimp-gt and its content with the latest zipped GMIC-plugin (v.2.2.1)for Windows. Gimp 2.10 RC1 starts without error message then.