In most cases the Chameleon installation program will correctly set up the PATH environment variable. However, it's useful to know how this variable should be set for deployment purposes.

The PATH variable must have the directory of Chameleon on it so the CHM_LIB3.DLL file can be loaded. This DLL is the Chameleon engine. The bridge between the C# and C++ core of Chameleon is CHM_CSHARP.DLL.

• Chameleon versions 4.5 and below: The Chameleon installer inserts the DLL in the GAC automatically. If there are any issues, the installation can be done using the .NET GACUTIL tool, or by dragging and dropping the CHM_CSHARP.DLL from C:\Program Files\iNTERFACEWARE\Chameleon\csharp\ into the global assembly cache.

• Chameleon versions 5.0 and higher: When you upgrade to Chameleon versions 5.0 and higher, the CHM_CSHARP.DLL is removed from the GAC to prevent older versions of the DLL being left installed when you upgrade. To ensure your application runs properly, you must move the original CHM_CSHARP.DLL to your project directory.

	To learn how to run two versions of Chameleon on the same machine and how it affects your C# applications, see Running Two Versions of Chameleon on the Same Machine.