HD 1 C:\Windows\SysWOW64\java -Xmx1000m -cp pocminer.jar;lib/*;lib/akka/*;lib/jetty/* pocminer.POCMiner generate 4651495086655359966 1 10800000 1000 4
HD 2 C:\Windows\SysWOW64\java -Xmx1000m -cp pocminer.jar;lib/*;lib/akka/*;lib/jetty/* pocminer.POCMiner generate 4651495086655359966 1 5400000 1000 4
HD 3 C:\Windows\SysWOW64\java -Xmx1000m -cp pocminer.jar;lib/*;lib/akka/*;lib/jetty/* pocminer.POCMiner generate 4651495086655359966 1 3720000 1000 4
HD 4 C:\Windows\SysWOW64\java -Xmx1000m -cp pocminer.jar;lib/*;lib/akka/*;lib/jetty/* pocminer.POCMiner generate 4651495086655359966 1 2840000 1000 4
HD 5 C:\Windows\SysWOW64\java -Xmx1000m -cp pocminer.jar;lib/*;lib/akka/*;lib/jetty/* pocminer.POCMiner generate 4651495086655359966 1 2400000 1000 4
HD 6 C:\Windows\SysWOW64\java -Xmx1000m -cp pocminer.jar;lib/*;lib/akka/*;lib/jetty/* pocminer.POCMiner generate 4651495086655359966 1 3200000 1000 4
They all overlap

> 4651495086655359966 1 10800000 1000 4
this generates nonces from 1 to (1+ 10800000 -1)
the next one generates the same nonces.
The second one should be:
HD 2 C:\Windows\SysWOW64\java -Xmx1000m -cp pocminer.jar;lib/*;lib/akka/*;lib/jetty/* pocminer.POCMiner generate 4651495086655359966 10800000 5400000 1000 4
then:
HD 3 C:\Windows\SysWOW64\java -Xmx1000m -cp pocminer.jar;lib/*;lib/akka/*;lib/jetty/* pocminer.POCMiner generate 4651495086655359966 16200000 3720000 1000 4
I'm afraid you have to delete Your plots on HD2 to HD6 and redo them.
No problem. Still learning. Thanks for the heads up.
So I reset them all and I have started from scratch. So for HD 1 I have:
C:\Windows\SysWOW64\java -Xmx1000m -cp pocminer.jar;lib/*;lib/akka/*;lib/jetty/* pocminer.POCMiner generate 4651495086655359966 1 10800000 1000 4
This worked before but now I am getting an error and it shuts down. Any idea why?:

I see out of memory but that can't be it. I have 32 GB