The standard installation of ArgoUML does not support C++, php and C# code generation. To make this possible, you need to download the auxiliary modules from the download page at the ArgoUML website.
Unpack the downloaded file in the same directory as you unpacked ArgoUML itself.
The result should be that the directory that contains the
argouml.jar
file, now also contains a subdirectory
named ext
, which contains the
.jar
files for the extra languages.