How can I present a pick list in a SharePoint 2010 External List form from an association in my BDC model?

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I have created associations between entities in my . Net assembly BCS model. When I load the model into SharePoint and create external lists, I automatically get an External Item Picker control; enabling me to select an item from a list.

This is great because I don't have to program this pick list one way or another... The problem is whenever I modify the form in InfoPath, the External Item Picker seems to break. When I select an item using the External Item Picker (in the InfoPath form) I get an error message "There has been an error while processing the form". This message is displayed as soon as I select an item and try to leave the field; WITHOUT submitting the form.

Can anyone tell me why the External Item Picker breaks whenever I modify and publish the list form from InfoPath 2010? It's driving me nuts! Thanks!

Sharepoint2010 infopath2010 link|improve this question asked Sep 27 '11 at 13:17maevvamgr12.

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