On loading NudiBranch I get this error (Mac VM Squeak 3.0Alpha14MT):

17 May 2001 11:37:34 am
MessageNotUnderstood: do:

VM: Mac OS - Squeak3.1alpha of 6 February 2001 [latest update: #3987]
Image: Squeak3.1alpha [latest update: #4026]

UndefinedObject(Object)>>doesNotUnderstand:
ImageSegment>>comeFullyUpOnReload:
SmartRefStream(DataStream)>>next
SmartRefStream(ReferenceStream)>>next
SmartRefStream>>next
SmartRefStream>>scanFrom:
ObjectScanner>>scanFrom:
[] in RWBinaryOrTextStream(PositionableStream)>>fileInAnnouncing:
ProgressInitiationException>>sendNotificationsTo:
[] in ComplexProgressIndicator>>withProgressDo:
ProgressInitiationException(Exception)>>handlerAction
ProgressInitiationException(Exception)>>signal
ProgressInitiationException>>display:at:from:to:during:
ProgressInitiationException class>>display:at:from:to:during:
String>>displayProgressAt:from:to:during:
RWBinaryOrTextStream(PositionableStream)>>fileInAnnouncing:
RWBinaryOrTextStream(PositionableStream)>>fileIn
RWBinaryOrTextStream(ReadWriteStream)>>fileInObjectAndCode
ProjectLoading class>>openName:stream:fromDirectory:withProjectView:
[] in ProjectLoading class>>openFromDirectory:andFileName:
BlockContext>>on:do:
[] in ComplexProgressIndicator>>withProgressDo:
BlockContext>>on:do:
ComplexProgressIndicator>>withProgressDo:
ProjectLoading class>>openFromDirectory:andFileName: