[DMN Designer] Error when user creates relations between elements ----------------------------------------------------------------- Key: DROOLS-3350 URL: https://issues.jboss.org/browse/DROOLS-3350 Project: Drools Issue Type: Bug Components: Stunner Reporter: Guilherme Carreiro Assignee: Roger Martínez Priority: Minor Labels: drools-tools Attachments: error.gif Sometimes, when user creates relations between some diagram elements, an error popup appears. --- Steps to reproduce: !error.gif|thumbnail! The error copied to clipboard in the GIF is here: {{Uncaught exception: Exception caught: (TypeError) : Cannot read property 'tT' of null Caused by: (TypeError) : Cannot read property 'tT' of null | Uncaught exception: Exception caught: (TypeError) : Cannot read property 'tT' of null Caused by: (TypeError) : Cannot read property 'tT' of null | Uncaught exception: Exception caught: (TypeError) : Cannot read property 'tT' of null Caused by: (TypeError) : Cannot read property 'tT' of null | Uncaught exception: Exception caught: (TypeError) : Cannot read property 'tT' of null Caused by: (TypeError) : Cannot read property 'tT' of null}} --- (Since it's an intermittent issue, sometimes the steps above do not show the issue).