Hi list, I´m working on Visual Works, and when a change the persistecy policy for PRImagePersistency and send #start, works. But when I add or remove a page the system crash. If I put PRNullPersistency again there is no problems. Here is the stack: BlockClosure [] in Object>>doesNotUnderstand: * optimized [] in Magritte.MAComponentRenderer>>hasError: self BlockClosure [] in Magritte.MAComponentRenderer>>hasError: *temps* each a MessageNotUnderstood self a Magritte.MATableRenderer *inst vars* method CompiledBlock [] in Magritte.MAComponentRenderer>>hasError: outerContext nil copiedValues a Magritte.MATableRenderer * OrderedCollection>>do: self OrderedCollection (a MessageNotUnderstood) *temps* aBlock BlockClosure [] in Magritte.MAComponentRenderer>>hasError: index 1 *inst vars* firstIndex 1 lastIndex 1 * Magritte.MATableRenderer(Magritte.MAComponentRenderer)>>hasError: self a Magritte.MATableRenderer *temps* aDescription a Magritte.MAPriorityContainer label: 'Add' comment: nil *inst vars* component a Magritte.MAContainerComponent html a Seaside.WARenderCanvas errors IdentitySet () * optimized [] in Magritte.MAComponentRenderer>>classFor: self BlockClosure [] in Magritte.MAComponentRenderer>>classFor: *temps* stream a WriteStream aDescription a Magritte.MAPriorityContainer label: 'Add' comment: nil self a Magritte.MATableRenderer *inst vars* method CompiledBlock [] in Magritte.MAComponentRenderer>>classFor: outerContext nil copiedValues #(a Magritte.MAPriorityContainer label: 'Add' comment: nil a Magritte.MATableRenderer) * String class(SequenceableCollection class)>>streamContents: self String *temps* blockWithArg BlockClosure [] in Magritte.MAComponentRenderer>>classFor: stream a WriteStream *inst vars* superclass CharacterArray methodDict MethodDictionary (#printOn: #hash #= #storeOn: #isLiteral #isSameXmlAs: #string #indexOfAnyOf:startingAt:ifAbsent: #withSqueakLineEndings #asDateAndTime #copyToHeap:encoding: #stringhash #asMIMEDocumentType: #compare: #asByteString #includesSubstring:caseSensitive: #asInteger #padded:to:with: #endsWith: #skipDelimiters:startingAt: #< #<= #>= #> #isString #includesSubString: #decodeAsLiteralArray #asTimeStamp #runLengthFor: #asParagraph #asText #lines #sunitMatch: #+ #caseInsensitiveLessOrEqual: #getEnclosedExpressionFrom: #asTwoByteString #asDuration #translated #copyToHeapUnicode #asDate #withoutQuoting #withSeparatorsCompacted #fullMetaName #inspectorClass #findTokens: #withBlanksTrimmed #gcCopyToHeapUnicode #sameAs: #gcCopyToHeapEncoding: #capitalized #copyToHeapEncoding: #asWordArray #changeFrom:to:with: #renderOn:indentLevel: #evaluateExpression:parameters: #concreteIndexFor: #copyToHeap: #indexOf:startingAt:ifAbsent: #convertToByteArray #encodeForHTTP #classNameOnly #refersToLiteral: #concreteString #asByteArrayEncoding: #asHexString #sunitSubStrings #prettyPrintHtmlOn:indentLevel: #asFourByteString #namesMetaClass #copyToHeap16Encoding: #trueCompare: #textRepresentation #asCapitalizedPhrase #stringEncoding #format: #isByteIndexed #asByteArray #printHtmlOn: #asClassNameOnly #asMIMEDocument #md5Hash #beginsWith: #asTime #hasChangeOfEmphasis #literalArrayEncoding #withHTMLEscapes #gcCopyToHeap16Encoding: #matches: #findDelimiters:startingAt: #renderOn: #isoToSqueak #indexOfSubCollection:startingAt: #sunitAsSymbol #adaptToString:andSend: #indexOfAnyOf:ifAbsent: #isAllSeparators )...etc... format 16384 subclasses #(ByteEncodedString TwoByteString Symbol GapString FourByteString) instanceVariables nil organization ('accessing' #changeFrom:to:with: #concreteIndexFor: #concreteString #indexOfSubCollection:startingAt: #runLengthFor: #string #stringEncoding) ('converting' #asByteArray #asByteArrayEncoding: #asByteString #asFourByteString #asParagraph #asText #asTwoByteString #asWordArray #convertToByteArray #decodeAsLiteralArray #literalArrayEncoding #withHTMLEscapes) ('comparing' #< #<= #= #> #>= #hash #sameAs:) ('te...etc... name #String classPool String asNameSpace environment Core Greetings in advance!