I have recently run into an issue that rendered my CHC masternode completely useless, and I have seen multiple people experiencing the exact same issue.

How to know if you are receiving the "POS Error":

Find out by opening the debug console and typing: masternodelist full yourip. If you are experiencing this issue it will return:
 "POS Error 70002", followed by your masternodeprivkey.

How to fix this, and get rewards again:
----------------------------------------------------------------------------------------------
The fix is probably much easier than you'd expect, you just need to:
1: Back up your wallet.dat (located in %appdata% > chaincoin)
2: Uninstall the Chaincoin core using the uninstaller, or deleting the files manually.
3: Delete the whole chaincoin folder inside of the appdata folder, which was mentioned above.
4: Re-install it, by following my friend Jeff's steps: https://steemit.com/chaincoin/@jeffblogs/how-to-host-a-chaincoin-masternode-on-windows

I hope this helps all of you sad masternode owners out there! If you want to support me you can donate to the Alen fund:
PIVX: DAgswWofcpKHesNcec1nAYs2RZYTseEANd
CHC: CZxBBZSBas18TpVGptJ1UD8o5xvBB79RKw
BTC: 1Gk5QAskPSLascJrGz7rGurKgUDNDot9v1