So in 2014 I had 20,000 EMC and I put them on two paper wallets (made for a variation of the bitcoinpaperwallet.com at the time Link to post https://bitcointalk.org/index.php?topic=494708.msg5704701#msg5704701) that was posted by someone on here. Went to unload them and the private keys don't work with when trying to do the dump priv key function. I can verify the coins are still on there using the public key. I have tried everything and can't figure it out - willing to happily give 500 EMC to whoever can figure it out.
How your private key looks like?
You should import it in wallet with console with command like "importprivkey TB2HLvv2sUqSYGi349hW2qHgJoS4MaTueXtUwV4csB2HLvv"
There is different formats of private keys and you should convert your key to needed format.
You should read these and define what keys you have:
https://en.bitcoin.it/wiki/Paper_wallet
https://en.bitcoin.it/wiki/Private_key
If I helped: EPL8Xu7BZDaXbzUuzwRWkwvQvU2G7VTpes