Still not getting past 2103808.  This is 3rd try of deleting the entire .DNotes directory other than DNotes.conf.

debug.log has the following for every block after 2103808.

Before: 1b77af75 000000000077af75000000000000000000000000000000000000000000000000
After: 1b779481 0000000000779481ec194579430ee69e4f49ad519e634203785349c5e0a26e00
SetBestChain: new best=08e6e9dfe5f89394cd40  height=2103808  work=1458348923889783327  date=02/21/18 17:48:29
ProcessBlock: ACCEPTED
received block 5f6005b9bcb8b85afc12
Difficulty Retarget - Gravity Well
PastRateAdjustmentRatio = 0.937922
Before: 1b779481 0000000000779481000000000000000000000000000000000000000000000000
After: 1b7790d5 00000000007790d5df8663c91d6a8edf1bff4b781a627ee0243050908c6ba72d
InvalidChainFound: invalid block=5f6005b9bcb8b85afc12  height=2103809  work=1458351278033644953  date=02/21/18 17:50:07
InvalidChainFound:  current best=08e6e9dfe5f89394cd40  height=2103808  work=1458348923889783327  date=02/21/18 17:48:29
ERROR: SetBestChain() : SetBestChainInner failed
ERROR: AcceptBlock() : AddToBlockIndex failed
ERROR: ProcessBlock() : AcceptBlock FAILED
received block 085525cad6aebf38338b
Difficulty Retarget - Gravity Well
PastRateAdjustmentRatio = 0.937427
Before: 1b7790d5 00000000007790d5000000000000000000000000000000000000000000000000
After: 1b77a2fb 000000000077a2fb2b559b0d76f53cd60402e3a93a1e8a25056649a02c567f33
Postponing 1 reconnects
REORGANIZE
REORGANIZE: Disconnect 0 blocks; 08e6e9dfe5f89394cd40..08e6e9dfe5f89394cd40
REORGANIZE: Connect 1 blocks; 08e6e9dfe5f89394cd40..5f6005b9bcb8b85afc12
ERROR: Reorganize() : ConnectBlock 5f6005b9bcb8b85afc12 failed
InvalidChainFound: invalid block=085525cad6aebf38338b  height=2103810  work=1458353630782526333  date=02/21/18 17:50:10
InvalidChainFound:  current best=08e6e9dfe5f89394cd40  height=2103808  work=1458348923889783327  date=02/21/18 17:48:29
ERROR: SetBestChain() : Reorganize failed
ERROR: AcceptBlock() : AddToBlockIndex failed
ERROR: ProcessBlock() : AcceptBlock FAILED
received block a38bc6ef402b41390865
Difficulty Retarget - Gravity Well
PastRateAdjustmentRatio = 0.938313
Before: 1b77a2fb 000000000077a2fb000000000000000000000000000000000000000000000000
After: 1b778819 0000000000778819d32866852278cdbec56b63bd0bee16e1fbf9ed2d08384b5e
Postponing 2 reconnects
REORGANIZE
REORGANIZE: Disconnect 0 blocks; 08e6e9dfe5f89394cd40..08e6e9dfe5f89394cd40
REORGANIZE: Connect 1 blocks; 08e6e9dfe5f89394cd40..5f6005b9bcb8b85afc12
ERROR: Reorganize() : ConnectBlock 5f6005b9bcb8b85afc12 failed
InvalidChainFound: invalid block=a38bc6ef402b41390865  height=2103811  work=1458355985598345792  date=02/21/18 17:54:05
InvalidChainFound:  current best=08e6e9dfe5f89394cd40  height=2103808  work=1458348923889783327  date=02/21/18 17:48:29
ERROR: SetBestChain() : Reorganize failed
ERROR: AcceptBlock() : AddToBlockIndex failed
ERROR: ProcessBlock() : AcceptBlock FAILED
received block dd3a9be241ac3fcf1c37
Difficulty Retarget - Gravity Well
PastRateAdjustmentRatio = 0.935837
Before: 1b778819 0000000000778819000000000000000000000000000000000000000000000000
After: 1b77db0f 000000000077db0ffaca416cab079ec3339d69bc571c9d9dfdd8f4ae91fcc03a
Postponing 3 reconnects
REORGANIZE
REORGANIZE: Disconnect 0 blocks; 08e6e9dfe5f89394cd40..08e6e9dfe5f89394cd40
REORGANIZE: Connect 1 blocks; 08e6e9dfe5f89394cd40..5f6005b9bcb8b85afc12
ERROR: Reorganize() : ConnectBlock 5f6005b9bcb8b85afc12 failed
InvalidChainFound: invalid block=dd3a9be241ac3fcf1c37  height=2103812  work=1458358334047207816  date=02/21/18 18:00:44
InvalidChainFound:  current best=08e6e9dfe5f89394cd40  height=2103808  work=1458348923889783327  date=02/21/18 17:48:29