I retabulated the 500 error codes and we could retry on most of these, although I have some concern since I have never experienced these errors:

Error Code | Error Message                                                | HTTP Status Code and Description
---------- | ------------------------------------------------------------ | --------------------------------
1001       | The server encountered an internal error.  Please try again. | 500 Internal Server Error 
1007       | The server encountered an internal error.  Please try again. | 500 Internal Server Error
1013       | The server encountered an internal error.  Please try again. | 500 Internal Server Error 
1019       | The server encountered an I/O error.  Please try again.      | 500 Internal Server Error 
1020       | The requested resource is missing or could not be found.     | 500 Internal Server Error 
1024       | The server encountered an internal error.  Please try again. | 500 Internal Server Error 
1025       | The server encountered an internal error.  Please try again. | 500 Internal Server Error 
1026       | The server encountered an internal error.  Please try again. | 500 Internal Server Error
1027       | The server encountered an internal error.  Please try again. | 500 Internal Server Error 
1028       | The server encountered an internal error.  Please try again. | 500 Internal Server Error 
1029       | The server encountered an internal error.  Please try again. | 500 Internal Server Error 
1040       | The server is busy. Please try again                         | 500 Internal Server Error