When I run Tool++, click "Build-Cache-File", select my edited scenario, then run tool, it didn't response, regardless of other scenario or tutorial scenario.

Use regular tool.

Do you have a 64 bit version of Windows? I had this problem too, but I figured that the issue was the directory. Open Tool++, go to "Options", then Properties", and where it says "Halo Directory" check if it's "Program Files" or "Program Files (x86)"

OK, First time I use cmd to use tool.exe to build cache file, but it's failed to load scenario that it cannot build cache file.
Then I use Opensauce Installer to install OS HEK, and I tryed to use OStool to build cache file, it says my scenario is too large, failed.
I saw a post here then I know make yelo map instructions. I input it then it work.
But I can't continue to make yelo maps for my friends, most of them didn't use Opensauce. I heard someone says use tool++ to break the size limit, then I use tool++, but I didn't think of this result.

then how big is your map?

Thank you! It works well, you solved my problem.
Do you use Opensauce? I will publish my two yelo maps in new post for everyone.

me? yeah I do