http://msmvps.com/blogs/superska/archive/2008/06/22/the-custom-tool-mslinqtosqlgenerator-failed.aspx"Oh darn... it's one of those again". That was there first thing I thought recently when all-of-a-sudden I got an error in VS2008 after trying to open up a generated DBML file in the Object Relational Designer: "The operation couldenCommunityServer 2008.5 SP2 (Build: 40407.4157)