Please spend a minute or two looking at the simple slice attached to the issue below and say something on the issue tracker: Issue 13008: ContextPart>>errorReportOn: sends unknown #position to NonInteractiveTranscript https://pharo.fogbugz.com/f/cases/13008 -- Damien Cassou http://damiencassou.seasidehosting.st "Success is the ability to go from one failure to another without losing enthusiasm." Winston Churchill