[lively-kernel] newbie - "Cannot serialize old model object" problem

Jens Lincke jens.lincke at hpi.uni-potsdam.de
Mon Apr 25 09:17:57 CEST 2011

Hi Davide,

Thanks for your interest in Lively. And I am sorry for your initial experiences...

The places you started from are pretty much outdated. Our current development happens here:


we know about the problems of saving the old example page (index.XHTML) but we planed to throw that parts away, so we did not fix that.

You can edit in the webwerkstatt or copy pages from there as you like. For writing you have to register first:

there is a good overview page missing, since we did not have time to write it or nobody asked the right questions. So perhaps try these...




Am 25.04.2011 um 02:14 schrieb Davide Della Casa <davidedc at gmail.com>:

> I found what it was: in the index.xhtml world there is a subworld called Development tools.
> That subworld has a PanelMorph in it, with four buttons and a slider and a number of text boxes - if I delete that PanelMorph the serialization is OK.
> I first tried to only remove all the contents of the PanelMorph - but that didn't solve the serialization problem.
> So I thought that maybe PanelMorphs have a serialization problem, but if I create a PanelMorph from scratch it works fine...
> So I don't know if it helps, but I hope it helps.
> Cheers,
> Davide Della Casa
> On 25 Apr 2011, at 00:09, Davide Della Casa wrote:
>> Hi All,
>> LK is an amazing project and after some toying around on the website I just installed it locally on my mac (default configuration on OSX version i.e. 10.6.7 (latest version at time of writing)).
>> I had a couple of problems that I managed to resolve, and one problem still standing when saving worlds.
>>  - The video at http://www.youtube.com/watch?v=Gb3a70C15Sw seems to be slightly out of date and following those directions didn't seem to work.
>>  - So, I installed LK on the regular "Sites" directory - which is the default place where the web server fetches content - that works OK.
>>  - Then I had a problem in that the localconfig file is not included in the trunk (this is something that was spotted by Philip Weaver over two years ago http://forum.world.st/General-Instructions-for-Lively-Server-Setup-tt3033897.html#a3033900#none ) - but I copied a version from here http://www.lively-kernel.org/trac/browser/branches/interns/source/kernel/localconfig.js?rev=1340&order=name .
>>  - Also the " nocursor.cur " file is missing, but I found a blank cursor file from here and plugged that one in http://pc.autons.net/stuff/blanks/ so that's ok too.
>> After these initial troubles I got the worlds to open and work OK but... while saving a world (e.g. just the plain index.xhtml world), I get these errors in the console:
>>  - problems to parse  http://localhost/lively/index.xhtml
>>  - alert: Cannot serialize model stuff of type lively.data.DOMNodeRecord
>> The world file *is* successfully created (so I believe this means that the WebDav worked), but when I load it I get a green/red world of death saying:
>> ALERT: Cannot serialize old model object: {"_livelyDataWrapperId_":"172:anonymous_22","B1Value$observers":[{"__isSmartRef__":true,"id":883},{"__isSmartRef__":true,"id":884}],"B2Value$observers":[{"__isSmartRef__":true,"id":1120},{"__isSmartRef__":true,"id":1121}],"List$observers":[{"__isSmartRef__":true,"id":1122},{"__isSmartRef__":true,"id":1123}],"ListItem$observers":[{"__isSmartRef__":true,"id":1122},{"__isSmartRef__":true,"id":1123}],"Text$observers":[{"__isSmartRef__":true,"id":1124},{"__isSmartRef__":true,"id":1125},{"__isSmartRef__":true,"id":1126}],"TextSel$observers":[{"__isSmartRef__":true,"id":1127}],"PrintValue$observers":[{"__isSmartRef__":true,"id":1128},{"__isSmartRef__":true,"id":1129}],"SliderValue$observers":[{"__isSmartRef__":true,"id":1130},{"__isSmartRef__":true,"id":1131}],"SliderRange$observers":[{"__isSmartRef__":true,"id":1132},{"__isSmartRef__":true,"id":1131}],"__SourceModuleName__":"Global.anonymous_module_5","__rawNodeInfo__":{"tagName":"record","namespaceURI":"http://www.w3.org/2000/svg","attributes":[{"key":"id","value":"172:anonymous_22","namespaceURI":null}]},"definition":"{\"Text\":{},\"TextSel\":{},\"List\":{},\"ListItem\":{},\"PrintValue\":{},\"B1Value\":{},\"B2Value\":{},\"SliderValue\":{},\"SliderRange\":{}}","isInstanceOfAnonymousClass":true}
>> Error while loading anonymous_module_3: Error: delegate [object Object] does not implement setTextSel
>> Any hints?
>> Cheers,
>> Davide Della Casa
>> http://www.sketchpatch.net
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