InvalidOperationException String length

Hey everyone, I recently upgraded my code from vb 6 to .NET. I've knocked off all my errors...but when my project builds...the InvalidOperationException wizard pops up with the following info:

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System.InvalidOperationException was unhandled
Message="An error occurred creating the form. See Exception.InnerException for details. The error is: Length of argument 'String' must be greater than zero."
Source="UPI"
StackTrace:
at UPI.My.MyProject.MyForms.Create__Instance__[T](T Instance) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 190
at UPI.My.MyProject.MyForms.get_Form1()
at UPI.Form1.Main() in C:\UPI.NET\Form1.Designer.vb:line 1
at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

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How do I possibly figure out what line this is occuring on in my code Thanks!