What does this mean : fatal error C1900: Il mismatch between 'P1' version '19991026' and 'P2' version '1997071

hi , i'm a programmer.i 've worked with different programs,but this visual C++ ,which i started recently, is another world !! anyway,I'm using a "Teach yourself " manual which i found on the net.My problem is as I follow the orders,I face an error which is not predicted by the manual %26amp; so i can't execute %26amp; continue .when i click F7 to compile, this problem occurs :





fatal error C1900: Il mismatch between 'P1' version '19991026' and 'P2' version '19970710'


Error executing cl.exe.


rr.exe - 1 error(s), 0 warning(s)





according to my manual,i shall receive 0 errors,0 warnings.


what is this mismatch? how can i find the error?

What does this mean : fatal error C1900: Il mismatch between 'P1' version '19991026' and 'P2' version '1997071
Reference : Save to Favorites. A big list of errors


http://msdn2.microsoft.com/en-us/library...


Visual C++ Concepts: Building a C/C++ Program


Fatal Error C1900





Il mismatch between 'tool1' version 'number1' and 'tool2' version 'number2'





Tools run in various passes of the compiler do not match. number1 and number2 refer to the dates on the files. For example, in pass 1, the compiler front end runs (c1.dll) and in pass 2, the compiler back end runs (c2.dll). The dates on the files must match and if they do not, reinstall and use the current version of each tool.

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