SIMLIB/C++ FAQ
==============

Q) Simulation is too slow
A) Maybe the problem is calendar implementation (linked list by default).
   When you have more than cca 1000 processes/events scheduled, try to use
   _experimental_ CalendarQueue implementation before Init(...);
     SetCalendar("cq");

Q) Block expression evaluates to bad value
A) Possible use of double or int variable
       double(x)*double(y)*block
   means
       Constant(double(x)*double(y))*block

   you can't use C++ variable in block expression if you want to change its
   value during simulation (for example the variable Time can't be used -- you
   should use continuous block T)


Q) After Release(Facility) the predicate Facility.Busy() is true
A) Yes, the Facility is automatically seized by first entity in input queue
   and this is done by Release() method -- it means
   that after Release() the facility can be busy.

Q) I have problem with arrays
A) check indexes (C++ does not)
A2) If you are using GCC 4.9.0, use another version of the compiler.

Q) My simulation crashed after end of run
A) possibilities:
       -- bad use of pointers or array indexes
       -- objects in unterminated Behavior()
       -- etc...


Q) I got SIMLIB error: entity activation in the past
A) You probably used Normal() random generator for waiting by Wait().
   Normal() can produce negative number.
   Scheduling event activation in the past is impossible.

Q) My simulation does not stop. Debugger shows that it is infinite loop in
   myEvent::Behavior().
A) You are using old (=pre 3.00) version of SIMLIB.
   This was bug in SIMLIB. All events (derived from Event) were actually
   periodic events - you used either
      Activate(Time+something);  to schedule next activation or
      Cancel();  to stop and destroy the event.
   Cancel is no more needed in new version (v3).

Q) Time statistics (class TStat) reports an error for multiple experiment
   simulation.
A) You should do  tstat.Clear() after Init(t1,t2) and before Run(). Those
   statistics depend on model time, and seting the time in Init() leads to
   the error message. See multiexp.cc in SIMLIB examples.
   Because Facility, Store, and Queue contain time statistics, you should
   Clear() all such objects you defined in a model.