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invalid wide-character constant
Remarks
The multibyte-character constant is not valid.
To fix by checking the following possible causes
- The wide-character constant contains more bytes than expected. 
- The standard header STDDEF.h is not included. 
- Wide characters cannot be concatenated with ordinary string literals. 
- A wide-character constant must be preceded by the character 'L': - L'mbconst'
- For Microsoft C++, the text arguments of a preprocessor directive must be ASCII. For example, the directive, - #pragma message(L"string"), is not valid.