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In SharePoint 2010, I have a BDC connection created by importing a BDC model file via central admin. However, the machine providing the web-service has changed and I need to update the BDC model's properties to reflect this. (In particular, the WSDL's URL has changed).

How can I do this? If I attempt to simply upload an updated .bdcm file I get the error:

Application definition import failed. The following error occurred: Cannot merge contents of LobSystem (External System) with Name 'TrainingService' as it appears to be different from a preexisting LobSystem in the current load context. Error was encountered at or just before Line: '13' and Position: '8'.

I am considering using Import-SPBusinessDataCatalogModel with the -Force parameter, but am worried that my existing lists based upon the external content type will break. Will this happen?

What is the correct approach for updating deployed BDC models?

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2 Answers

Did you update the version numbers? Go through your file and increase all "Version" tags by one (the last number, the format is 1.n.n.n)

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I tried this. It didn't solve the problem. –  Colin Mar 8 '12 at 11:02
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I found the solution here: http://social.technet.microsoft.com/Forums/ha-Latn-NG/sharepoint2010setup/thread/801586ef-ddf4-4dd7-a562-0126af291beb

Simply deleting the old BDC model and importing the modified version worked.

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