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I'm struggling since a couple of weeks with setting a multiple values cascading lookup field using a client object model, I could set the first value but then It show me an error of invalid lookup value, even I'm sure that the value exist and is valid. I tried different ways but always the same problem. FYI, I could set a simple lookup field even with multiple values but not cascading. I did a lot of searches on the internet and nothing really relevant and helpful at the moment. Any help, I start to loose my mind!!!!!

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I'd suggest looking at the SPServices javascript library. Marc has made a great function the handles cascading very simple with jQuery. Since you're already using client side script, this might be another option.

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Thanks for your quickly response! –  imen Apr 13 '12 at 14:33
    
But Actually I'm creating a VB script to migrate my data from an external SQL database to sharepoint. So I'm not sure if this solution could be so helpful, I'm not using jquery. Any other directions please! –  imen Apr 13 '12 at 14:36
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That type of information would have been helpful in the description. –  PirateEric Apr 13 '12 at 14:38
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I think that you need to edit your question with a better explanation. It is unclear to me what your question has to do with SharePoint's Client Object Model if the data you are talking about is from an external source. –  Robert Kaucher Apr 23 '12 at 12:56
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