Abstract: An arrangement is provided for generating an error chain in a call stack. A function is invoked to perform a functionality. If an error occurs during performing the first function, errors including the ones contained in an error chain, created based on at least one context specific error state and represented by an error tokan, and the error, occurred during said performing the functionality, are processed. The function then returns to another function that invokes it either with a new token error token representing a new error chain containing the error occurred and the errors contained in the error chain or with an error status. If the function does not error, it returns a normal status to the other function that invokes it.

Abstract: An arrangement is provided for generating an error chain in a call stack. A function is invoked to perform a functionality. If an error occurs during performing the first function, errors including the ones contained in an error chain, created based on at least one context specific error state and represented by an error tokan, and the error, occurred during said performing the functionality, are processed. The function then returns to another function that invokes it either with a new token error token representing a new error chain containing the error occurred and the errors contained in the error chain or with an error status. If the function does not error, it returns a normal status to the other function that invokes it.

Abstract: A mechanism for communication between a first software application and a second software application. A channel receives from a first software application transport information and an identifier of a memory location of a message to a second software application. The channel stores in a different memory location the transport information and the identifier of the memory location of the message. The channel transmits to the second software application based on the transport information a different identifier of the different memory location. The channel receives the different identifier of the different memory location from the second software application. The channel retrieves from the different memory location the identifier of the memory location and transmits the identifier of the memory location to the second software application.

Abstract: An arrangement is provided for data pool with validity detection. To access data stored in a data pool on a server, a client sends a service request with a handle having an associated version indicator. When the server receives the service request, the server examines the validity of the handle based on the version indicator. The server provides the requested service only when the version based validity detection indicates that handle is valid.