SSIS Failed to start project

I've created sereral SSIS packages in Visual Studio 2012 and they can be executed without any problems. For a project I'm working on I generate packages using BIML. In my BIML script I create a package for each databaseview in two defines databaseschemas. For example: - [crm].[contact] - [crm].[account] - [navision].[vendor] - [navision].[customer] The name of the packages will be [schemaname] viewname, e.a. "[crm] contact". When I start a package in Visual Studio I get the message "Failed to start project" see below. "Exception deserializing the package. "Specified part does not exist in the package". Why is this error occurring?