ignal sent to a stopped process instance. The signal is discarded. Error in SDL import: attempt to import from Null, from a stopped process instance or from the environment; no process exports this variable or the specified process does not export this variable. Errors in SDL view: attempt to view from Null, attempt to view from stopped process instance, attempt to view from the environment, the specified process does not reveal this variable, no process reveals this variable. Value out of range: for example, in a syntype, in an Array operator or in a String operator. Interactive Simulation 109 Error when accessing a component: nonactive choice or UNION component, component is not present, or attempt to access a nonactive optional struct component. De-referencing of Null pointer: attempt to de-reference a Null pointer defined using the Ref generator (Pointers and Ref are specific to Tau). Attempt to divide by zero in sorts: Integer, Real or Octet. Integer overflow using the operator Fix. User specified error forced by the SDL error expression (e.g. n := ERROR in a task symbol). 4.4.2 Dynamic errors detected by ObjectGeode SDL Simulator 4.4.2.1 SDL model errors Nonconformance to expected behavior: by examining the simulation textual or MSC trace, you discover that the SDL model does not behave as expected. An example of such an error was discovered in Section 4.3.5.2. Deadlock: the SDL simulation should continue but no transition is ready. Infinite loops: inside a transition, detected because the maximum number of symbols trans_ events_limit is reached. Discarding an unexpected signal 47: an example of such error was discovered in Section 4.3.3.1. 4.4.2.2 SDL dynamic errors Decision answer missing: the value of the expression in a decision did not match any of the answers. Create process instance: attempt to create more process instances than the maximum number specified (warning). Output (without specifying to < Pid >) to a process with more than one instance47 (multiple receivers). If not configured to give an e