More SSIS Obscurity (SSIS error 0xC0010009)

Another long winded, difficult to decipher error message from SSIS today..

[Pass Maximum ID Back as variable [378]] Error: System.Runtime.InteropServices.COMException (0xC0010009): Exception from HRESULT: 0xC0010009
   at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.HandleUserException(Exception e)
   at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.PostExecute()
   at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostPostExecute(IDTSManagedComponentWrapper100 wrapper)

Posting this incase anyone else (like me) finds themself googling SSIS error 0xC0010009.
It translates to 'Item in a collection not found' and in my case was caused by me using camelCase variable names in my SSIS package and attempting to reference them in lowercase. Argh!!!! Note to self, variable names are CASE SENSITIVE!
 
http://wiki.sqlis.com/default.aspx/SQLISWiki/0xC0010009.html