I've recently installed Net3 Concert 4.0.2 on my PC, and upon opening the program I'm met with the following error, and Concert will not open after clicking OK:
ETC_Net3Concert.exe - Entry Point Not Found
The procedure entry point _o__configure_narrow_argv could not be located in the dynamic link library
The same error in German:
Explanation of Issue & Solution
This occurs because an earlier version of Microsoft Visual C++, which Net3 Concert uses, is installed on the PC and must be updated for Concert to run. You can locate the files here: https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads
Choose the x86: vc_redist.x86.exe, since Net3 Concert is a 32-bit program, even when on a 64-bit OS.