• Windows 7 Professional (32 and 64 bit)
• Windows Vista Business (32-bit and 64-bit)
• Windows 2000 Professional
• Windows XP Professional (32-bit and 64-bit)
• Windows 2000 Server
• Windows Server 2003 (32-bit and 64-bit) and Windows Server 2003 R2 (32-bit and 64-bit)
• Windows Server 2008 (32-bit and 64-bit)

• Red Hat Enterprise Linux 4 (v2.6 Linux kernel)
• Red Hat Enterprise Linux 5 (v2.6.18 Linux kernel)

Special Requirements (Windows Vista, Windows Server 2008, and Windows 7)
User Account Control (UAC) enabled on Windows Vista, Windows Server 2008, and Windows 7 can restrict user privileges for application software installed in C:\Program Files or C:\Program Files (x86).

• Install OPNET software in a different directory;
  
• Run OPNET software as the Administrator User; or
  
• Disable UAC (not recommended by OPNET unless you first check with your local system administrator)

Special Requirements Special Requirements (Linux)
On Linux installations the license file must be stored in either the /opt or /var/adm directory. The directory that is chosen must be located on a local hard drive or partition, may not be a symlink, and may not be a network mounted partition.

• Install OPNET software in a different directory;
  
• Run OPNET software as the Administrator User; or
  
• Disable UAC (not recommended by OPNET unless you first check with your local system administrator)

Microsoft Visual C/C++ 6.x, Microsoft Visual Studio .NET 2002, Microsoft Visual Studio .NET 2003, Microsoft Visual Studio 2005, Microsoft Visual Studio 2008, or Microsoft Visual C++ 2008 Express Edition

For instructions on configuring Visual Studio 2005, please see FAQ 1685, [What are the proper system environment settings for Microsoft Visual Studio 2005 compiler to work with release 12.0 or later?].

For instructions on configuring your installation for Microsoft Visual C/C++ 6.x, please see FAQ 2037 [I upgraded to Modeler 12.1 or 14.0 and now I get the following error: "op_win_stdio_patch.obj : fatal error LNK1103: debugging information corrupt; recompile module" What should I do to fix this?].

Note: OPNET highly recommends the Professional Edition of the Visual C/C++, .NET 2003, or Visual Studio compiler. Using the Standard Edition of the compiler, which does not allow for code optimizations, will result in slower Discrete-Event Simulations.

IT NetMapper is an optional add-on module to IT Guru Network Planner that automatically generates content-rich network diagrams in Microsoft Visio format.

IT NetMapper requires Visio 2007 (Standard or Professional) or Visio 2003 SP 3 or later (Standard or Professional).