Entity Framework Migrations Error - Sequence contains no elements

command: add-migration blahblah -verbose error: Sequence contains no elements I did a few things before getting this error. I made a change to my code-first model but did not run`add-migration` yet. Then I added an EDMX model to play around with an idea visually. I realized the EDMX model was messing with my code so I removed it. I tried to run `add-migration` and got "Sequence contains no elements". I upgraded to EF 5 and uninstalled the old Migrations package except for my configurations. Then I tried `add-migration` again and I am still getting "Sequence contains no elements". Below is the rest of the error. ``` System.InvalidOperationException: Sequence contains no elements at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source) at System.Data.Entity.Migrations.Infrastructure.EdmModelDiffer.GetQualifiedTableName(XDocument model, String entitySetName) at System.Data.Entity.Migrations.Infrastructure.EdmModelDiffer.<FindRenamedIndependentAssociationColumns>b__ba(<>f__AnonymousType16`2 <>h__TransparentIdentifieraa) at System.Linq.Enumerable.<>c__DisplayClass12`3.<CombineSelectors>b__11(TSource x) at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext() at System.Linq.Enumerable.<ConcatIterator>d__71`1.MoveNext() at System.Linq.Enumerable.<ConcatIterator>d__71`1.MoveNext() at System.Linq.Enumerable.<DistinctIterator>d__81`1.MoveNext() at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source) at System.Data.Entity.Migrations.Infrastructure.EdmModelDiffer.Diff(XDocument sourceModel, XDocument targetModel, String connectionString) at System.Data.Entity.Migrations.DbMigrator.Scaffold(String migrationName, String namespace, Boolean ignoreChanges) at System.Data.Entity.Migrations.Design.MigrationScaffolder.Scaffold(String migrationName, Boolean ignoreChanges) at System.Data.Entity.Migrations.Design.ToolingFacade.ScaffoldRunner.Scaffold(MigrationScaffolder scaffolder) at System.Data.Entity.Migrations.Design.ToolingFacade.ScaffoldRunner.RunCore() at System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.Run() Sequence contains no elements ```