excellent work!

I wanted to try ccminer with equihash e.g. on btcp.suprnova (tried also other pools and other coins), all the same message:

[2018-06-17 19:55:39] 1 miner thread started, using 'equihash' algorithm.
[2018-06-17 19:55:39] Unsupported extranonce size of 16 (12 maxi)

Any idea why this happens?