The compiler option file has the following information on the compiler option.
Project manager (for Windows(x86) NetCOBOL)
WINCOB (for Windows(x86) NetCOBOL)
Windows(x64) NetCOBOL cannot use the compiler option file. Set the content of the compiler option file by the following.
The "Compiler Options" page of the property dialog box.
The environment variable
For details of the environment variable, refer to the "NetCOBOL User's Guide".