I�ve just hit an issue that prevented to open packages in monticello

MessageNotUnderstood: receiver of "indexOf:" is nil

UndefinedObject(Object)>>doesNotUnderstand: #indexOf:

MCFileRepositoryInspector>>packageSelection

PluggableListMorph>>getCurrentSelectionIndex

PluggableListMorph>>updateList

PluggableListMorph>>update:

MCFileRepositoryInspector(Object)>>changed: in Block: [ :aDependent | aDependent update: aParameter ]

DependentsArray>>do:

MCFileRepositoryInspector(Object)>>changed:

MCFileRepositoryInspector>>refresh

MCFileRepositoryInspector>>setRepository:workingCopy: in Block: [ ...

BlockClosure>>newProcess in Block: [ ...

This is what I�m using as hacky workaround:

MCFileRepositoryInspector>>packageSelection

^ self packageList isNil

ifTrue:[ 1 ]

ifFalse:[ self packageList indexOf: selectedPackage ]

The problem is that packageList is nil for some reason.

Looks like filetree is involved since

1. I�m using it and

2. it sets an extension method #refresh that makes packageList := nil