====Hash rate is changing/low====
This is normal as the x16r algo is changing 16 times in each block, determined by the last 16 bytes of the last block. We need to look at a 2-3 hour averages at least to get a better average hash rate to compare, try adding ' -N 600 ' at the end of your bat file, it increases the average reporting time (default is 30).
====Getting a lot of "rejected" shares====
A rejected share means 2 possibilities:
1. The submitted share was invalid (bad hash of good data). This is caused by a GPU error on your end.
2. The submitted share was stale (good hash of bad data). This is caused by latency or lost data over the network between you and the pool.
If you're tweaking your GPU a lot (customizing power/frequency/voltage/etc.) then try backing down a bit and see if you get less errors. You should also check to make sure connected to the closest pool possible (e.g., don't connect to a pool in Europe if you live in the USA).
===Nevermore / ccminer===