I was trying to compile a C++ Project in Visual Studio
and this project has a post-build step that executes
some batch statements.

And succendly from one day to the other the project failed
and the only message I had was
The input line is too long


After some googling I found that this error is displayed
when the command line in the command prompt
exceeds the maximum number of characters.
(Something quite obvious jeje)

The bottom line was that recenlty I had installed
some software and my PATH variable became TOO long
I fixed it by creating a new environment variable
called EXTRA_PATH where I put some references to
Some big paths and then changed my PATH variable
replacing all those long variables for %EXTRA_PATH%.

And problem solved!