This patch contains replacement SCCM install binary files for 64 bit AIX, zLinux, HPUX and Solaris platforms. When attempting to install SCCM 2.1 on a 64 bit AIX, zLinux, Solaris or HPUX platform the user will receive the following error: "This installer is a 32 bit installer, but the Tivoli Integrated Portal instance selected is a 64 bit instance. You need to choose a different instance , or run the 64 bit version of this installer." This fix contains the 64 bit version of the SCCM installer for AIX, zLinux, Solaris and HPUX. All other platforms are unaffected. Replace the existing binary with the relevant one for your operating system and rerun the install.