Feature Only in Professional and Enterprise Editions Profiling is supported only in Visual C++ Professional and Enterprise Editions. For more information, see Visual C++ Editions.
The profiler tools will not merge profile sessions run on two different operating systems. For example, if you copy the profiler sessions from Windows NT to a Windows 95 machine and try to merge the sessions, the profiler will generate this error:
PREP : fatal error PRF1463: different clock/sampling frequency
Do not attempt to merge profiling statistics gathered when profiling on two different operating systems. This behavior is by design.
To reproduce this behavior
Note The error doesn't appear if the profiling was done with the same operating system but on different computers. It will merge the timing statistics even though the results may not be consistent.