Attempted to read or write protected memory - Very Serious Error :-(

System.AccessViolationException HResult=0x80004003 Message=Attempted to read or write protected memory. This is often an indication that other memory is corrupt. I have about 100 or so items in the local memory cloud. This application is a WPF app using TGE for a local (Embedded) Knowledge graph. This is the second time I have encountered this problem in the past week or so. I have been using the TGE for ten years now and I have never had this type of low-level memory management error. Here is the offending C# code calling in the TGE API:  Here is the corresponding TSL Schema Code:  There error as far as I tell occurs on line 3343: