Tweak problem.

> I downloaded
>
>   http://tweakproject.org/download/iBuild-3.8-6665.1.zip
>
> filed-in build/install.st to
>
>   SystemVersion current version 'Squeak3.8'
>   SystemVersion current higestUpdate 6665
>
> and got the following error:
>
>   MCHttpRepository(Object)>>doesNotUnderstand: #cachedFileNames
>   MCConfiguration>>versionNamed:for:from:
>   [] in MCConfiguration>>depsSatisfying:versionDo:displayingProgress: {[:dep |  ver := dep versionInfo name.  repo := repoMap     at: ver     ifAbs...]}
>   [] in OrderedCollection(SequenceableCollection)>>do:displayingProgress: {[:each :i |  bar value: i.  aBlock value: each]}
>   OrderedCollection(SequenceableCollection)>>withIndexDo:
>   [] in OrderedCollection(SequenceableCollection)>>do:displayingProgress: {[:bar | self   withIndexDo: [:each :i |     bar value: i.    aBlock value: e...]}
>   [] in ProgressInitiationException>>defaultMorphicAction {[result := workBlock value: progress]}
>   BlockContext>>ensure:
>   ProgressInitiationException>>defaultMorphicAction
>   ProgressInitiationException>>defaultAction
>   UndefinedObject>>handleSignal:
>   MethodContext(ContextPart)>>handleSignal:
>   MethodContext(ContextPart)>>handleSignal:
>   ProgressInitiationException(Exception)>>signal
>   ProgressInitiationException>>display:at:from:to:during:
>   ProgressInitiationException class>>display:at:from:to:during:
>   ByteString(String)>>displayProgressAt:from:to:during:
>   OrderedCollection(SequenceableCollection)>>do:displayingProgress:
>   MCConfiguration>>depsSatisfying:versionDo:displayingProgress:
>   MCConfiguration>>upgrade
>
> How do I recover from this?
>
>
>