Compilation errors in script rules

Beginning with version 4.20, Service Virtualization optimized the internal classes used by the C# scripting rule. Several classes were removed and replaced with others. If your existing rules referenced a removed class, it will result in a compilation error when saving the rule or when switching the service to the Simulation state.

Workaround: Replace the original class name with the new one.

The following C# classes were changed beginning with Service Virtualization version 4.20.

Original class	Replaced with
HpsvActivitiesImpl	HpsvActivitiesBase
AbstractHpsvContext	HpsvContext
HpsvFileLogger	HpsvLogger
HpsvMessageLogger	HpsvLogger