Class PDEException

source code

              object --+                
                       |                
exceptions.BaseException --+            
                           |            
        exceptions.Exception --+        
                               |        
                   EnviException --+    
                                   |    
                        EmuException --+
                                       |
                                      PDEException

This exception is used in partially defined emulation to signal where execution flow becomes un-known due to undefined values. This is considered un-recoverable.