hi all, Where do Magritte errors get logged? On Moose tracker or somewhere else? There is a defect in validation of numbers like 3.48e-5 since Magritte MAStringReader >> visitNumberDescription: only allows a dash at the start. I've included the details below just so I don't lose them. regards -ben MAStringReader >>visitNumberDescription: aDescription | contents | (aDescription label first = $r) ifTrue: [ self haltOnce ]. contents := self contents. contents isEmpty ifTrue: [ MAReadError signal ]. (contents occurrencesOf: $-) > 1 ifTrue: [ MAReadError signal ]. (contents indexOf: $-) > 1 ifTrue: [ MAReadError signal ]. "^^^^^" (contents occurrencesOf: $.) > 1 ifTrue: [ MAReadError signal ]. (contents allSatisfy: [ :each | '+-0123456789.eE' includes: each ]) ifFalse: [ MAReadError signal ]. super visitNumberDescription: aDescription