问题
I recently upgraded from Delphi 2010 to Delphi XE4, but the paths to the source files on one application I am working on are not found by the compiler. I go to Tools-Project-Options and select the Platform as 64-bit Windows and add the paths to the source files to the Library path. I close the dialog and try to compile but the paths are not found. I reopen project options and find that it has reset itself to 32-bit windows.
What is causing the dialog to not set the paths and revert to 32-Bit Windows? The some files are found, but some are not. The files that are not found are the 64-bit Abbrevia files and the 32-bit Abbrevia files.
I have successfully created other 64-bit apps without this problem, so I an confused as to what is going on.
来源：https://stackoverflow.com/questions/17866331/delphixe4-64-bit-vcl-platform-growing-pains-how-to-set-64-bit-paths