While loading a project from a class-side #startUp: method, I'm getting a DNU #ifTrue:ifFalse which seemed to come from somewhere deep inside Metacello [1]. On the Metacello ML, Dale suggested that the startup mechanism might be the cause:

MetacelloSkipDirtyPackageLoad is a subclass of Notification, so if some piece of code is catching Notification or above and doing a simple resume, then you've found your culprit ... sounds like something startup code might do when the system isn't able to handle GUI interaction ... but it's a pretty harsh solution ...

This same code was not throwing an error on P6.1. Has something changed re startup in P7 that could account for this error? Thanks! [1] The top of the call chain is: DoItIn: arg1 ^ (MetacelloSkipDirtyPackageLoad signal: self) ifTrue: [ | tmp2 | tmp2 := Transcript. tmp2 cr; show: 'Skipping load of modified package: ' , self file. arg1 home return: self ] ifFalse: [ | tmp4 | tmp4 := Transcript. tmp4 cr; ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html