This constant determines whether the osOpenStream function is included in the compilation. The function is compiled when the constant is set to 1 and excluded when set to 0.

If this constant is not explicitly defined, it defaults to 1, and the function is included in the output code. If no osOpen* functions are utilized across the application, the system ignores object names and excludes the name management logic. This optimization reduces the final size of the executable code. For further details regarding object naming and the opening of existing objects, refer to the System Objects Management section.