AIX 4.2, 4.3; 5.1-5.3
Compilers:
     C/C++: IBM xlc/VisualAge C++; gcc/g++ 2.8 or 2.9x, (3.x only with "-gstabs+")
     Ada: PowerAda 5.x, GNATPro 5.x
Java: Version 1.4 or higher
Hardware: IBM RISC System/6000, SP/1, POWER 5, 6, PowerPC; 150M disk, 128M RAM

AIX 5.3 64-bit
Compilers: C/C++: IBM xlc/VisualAge C++
Java: Version 1.4 or higher
Hardware: IBM RISC System/6000 POWER 5, 6; 150M disk, 256M RAM

Red Hat Linux: RH9, RHEL 3, 4, 5; FC 3-9
Compilers:
     C/C++: gcc, g++ 2.9x, 3.x, 4.1.2
     Ada: PowerAda 5.x
Java: Version 1.3 or higher
Hardware: Pentium II or higher, 150M disk, 128M RAM

Note: RootCause works with 32 bit applications on either 32 or 64 bit operating systems.

Solaris 2.5.1 / SunOS 5.5.1 or higher
Compilers:
     C/C++: Sun Workshop C/C++ compiler version 4.2 or higher
           gcc/g++ 2.9x (gcc/g++ 3.x only with "-gstabs+")
     Ada: GNAT version 3.13 - 3.16; not GNAT 5
For Java: Version 1.3 or higher (or 1.2 "reference implementation"),
     running native threads
Hardware: Sparc & UltraSparc, 150M disk, 128M RAM

Windows XP / 2000 / NT (SP4 or higher)
Compilers: Microsoft Visual C++ version 5.0 and 6.0
      Microsoft Visual C++ version 7 (native only, not .NET)
For Java: Version 1.3 or higher
Hardware: Pentium or higher, 70M disk, 128M RAM