Anytime I try to compile something with my Microsoft Visual C++ 6.0 compiler, it says

[code]
--------------------Configuration: test123 - Win32 Debug--------------------
Compiling...
test123.cpp
c:\program files\microsoft visual studio\myprojects\test123\test123.cpp(4) : fatal error C1083: Cannot open precompiled header file: 'Debug/test123.pch': No such file or directory
Error executing cl.exe.

test123.obj - 1 error(s), 0 warning(s)
[/code]
any ideas?

You have set this cpp file in your project to use precompiled headers created by another cpp file. That other cpp file has not generated the precompiled headers. Try rebuild all, or changing settings to use automatic precompiled headers.