VTScada Thin Client Server Error Messages

The HTML server embedded within Thin Client Servers can generate error messages under certain conditions. All error messages are generated using the standard HTML error reporting method, giving an error number and explanatory text.

An example of an error response:

Error Code Message
400 Protocol not "HTTP" or request header malformed.
PageList request issued for a non-VTScada application.
401

Any of:

  • Originating IP address is on a DENY list or is not on an ALLOW list.
  • AppsList request issued, but user not authenticated by the VTScada Security Manager.
  • PageList request issued, but user not authenticated by the VTScada Security Manager.
  • VTS-BIN request issued, but user not authenticated by the VTScada Security Manager.

Note:You may receive a 401 error code if no VTScada application is running (i.e. the VTScada Security Manager cannot authenticate against any user accounts), or if the application you are requesting is not running.
403 This request would exceed the number of licensed connections.
404 GUID or application name in request specifies an unknown application.
A request was received for a file that could not be located.
500 Unused.
501 The HTTP request specified an unimplemented method (only "Get" is implemented).