CODEWITHSUNDEEP
c++visual-studio-2010visual-studiovisual-studio-2012
user3169700
user3169700

Reputation: 171

What causes MS Visual Studio to be unable to recognize build errors?

In Visual Studio Express 2010, I can usually only build a program once and then to make any changes I have to paste my code into a new project. It will say that the build was successful, but then I try to run it and get an error message saying,

"This project is out of date-- would you like to build it?"

and I click yes and I get another error message saying that there were build errors and I have to continue from the last successful build. Sometimes instead of running the last successful build I get an error message saying,

"Unable to open [directory to program]. The system cannot find the file specified."

I usually use Visual Express 2012 for this reason but even then it happens every now and then, seemingly at random. Once the issue begins there is no apparent way to fix it (rebuilding and restarting Visual Studio both have the same result). In Visual Studio Pro 2012 this also seems to happen.

EDIT: This is in the output box of the one in front of me (2010 edition)

1>------ Build started: Project: Lab01, Configuration: Debug Win32 ------
1>  Lab01.cpp
1>c:\program files (x86)\reference assemblies\microsoft\framework\.netframework\v4.0\system.core.dll : warning C4945: 'ExtensionAttribute' : cannot import symbol from 'c:\program files (x86)\reference assemblies\microsoft\framework\.netframework\v4.0\system.core.dll': as 'System::Runtime::CompilerServices::ExtensionAttribute' has already been imported from another assembly 'mscorlib'
1>          c:\windows\microsoft.net\framework\v4.0.30319\mscorlib.dll : see declaration of 'System::Runtime::CompilerServices::ExtensionAttribute'
1>          first seen type is used; re-order imported assemblies to use the current type
1>          This diagnostic occurred while importing type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
1>Lab01.cpp(28): error C2664: 'std::basic_istream<_Elem,_Traits> &std::basic_istream<_Elem,_Traits>::get(_Elem &)' : cannot convert parameter 1 from 'char [101]' to 'char &'
1>          with
1>          [
1>              _Elem=char,
1>              _Traits=std::char_traits<char>
1>          ]
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

I guess it says the error in there but it tells me "build succeeded" for some reason...

Upvotes: 0

Views: 1855

Answers (1)

user645280
user645280

Reputation:

Here's how to find and analyze errors reported by Visual Studio:

continue from the last successful build - Click NO (almost always). Errors should show up in the View->Error List. When confused, always check View->Output window after a build, it's a lot of the same info but more detailed.

rebuilding ... same result - A full rebuild should give some other error than project is out of date.

Lab01.cpp(28): error C2664: - Line 28 and 3 lines up and down of Lab01.cpp would be helpful.

Looks like you're doing something with std:: streams that isn't correct, but I don't know what without seeing the code. This should be in the Error List

warning C4945: - This occurs because you're using a mix of .net 4.0 and 4.5 and (possibly) a mix of clr and non-clr code within a single project. Recreating from a new CLR project which has chosen the correct .Net library version everywhere may remove this warning. (ExtensionAttribute got moved during the 4.0 to 4.5 upgrade)

This is just a warning, so shouldn't matter.

Upvotes: 2

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