This article explains the BACKTRACK problem preventing the creation of a new label after deleting a sample.
User is unable to create a new label after deleting the sample label in BACKTRACK 2012. If the sample label is deleted before any labels have been created, the system will produce an error message: “Object reference not set to an instance of an object”.
This is a software defect. The problem is confirmed for 2012 and 2015 versions.
To recover from this, please contact your EBI Support Coach.
KBA-01749-W9P8W2: Repair BACKTRACK to Recover Any Damaged Files