Error LNK1104 cannot open file 'C:\Demo_CPP\Ex8_05x\Debug\Ex8_05x.exe'

I got this error when I compile a demo project:

Error LNK1104 cannot open file 'C:\Demo_CPP\Ex8_05x\Debug\Ex8_05x.exe'

1. LINK : fatal error LNK1104: cannot open file 'D:\…\MyProj.exe'
2. Linker Tools Error LNK1104
3. fatal error LNK1104: cannot open file