And ModBloom is the first code block in the first posting (at least I would think that as it outputs "MOD_Bloom.bmx" to the log ;-)
Duh. Of course. :-?
OK, renaming the first file to mod_bloom.bmx, the second sample will now run without error... Except, it seems like nothing is actually happening....
changing the various parameters, all results in the same image being displayed, seemingly unaltered.