The solution control logic has many convergence criteria besides the one you are plotting. For example, you can plot Displacement Convergence, or Moment Convergence (for some elements).

In Workbench, use File Archive to create a .wbpz file, and do not include results. Put that file (not the .wbpj file!) on a file share such as a Jumpshare, OneDrive or Google Drive (allow anyone with the link to download it).  Put the link in your reply and I will download it and take a look. In your reply, say what version (Year and R#) of Ansys you are using.