Database Upgrade Errors

Hi,

I am upgrading from VisionApp Remote Desktop 2011 to ASG-RD 2017.  I have done the 2011 to 2012 database upgrade.  I am now doing the 2012 to 2017 database upgrade.  Everything works fine until it gets to the point of upgrading error log data.  It then throws the below error:

Migration aborted
GetStringFromReader
at UpgradeHelper2012.Upgrade.Start()
at
UpgradeHelper2012.MigrationWizard.backgroundWorkerExecute_DoW
ork(Object sender.DoWorkEventArgs e)
at System ComponenentModel.BackgroundWorker.OnDoWork
(DoWorkEventArgs e)
at System.ComponentModel.BackgroundWorker Worker ThreadStart
(Object argument)

Please advise.