Please accept my sincere apologies Jan, for coming across as impatient - I have proof to be patient: I have a beard! lol
It probably took me an hour or so with all testing, file renaming, re-uploading, re-encoding, and I was hoping to get a solution here: "oh, you silly bugger, you forgot to do XYZ ...

Thanks everyone Jan kindly replied and solved the issue YAY!

Hi all,

I'm stuck uploading a remix of Spy vs Spy. The site keeps reporting "SID not found in HVSC 76.".
I did a search of the SID on hvsc.c64.org/search, and it comes back with the same result "MUSICIANS/S/Scarim_Nick/Spy_vs_Spy.sid".

I tried different files in case there is something wrong with ...