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## Setup Options

#### System Stack

Numeric simple variables are put on the system stack. Deep recursion programs need much memory for the system stack.

#### Virtual Stack

If checked "USE Virtual Stack for Arrays", numerical arrays are put on the virtual stack. if not so, numerical arrays are put on the heap memory.
Recusive programs with array parameters or local array variables run faster when using Virtual Stack.
However Virtual Stack requres exclusive adress space, so when Virtual Stack size increased, System Stack and the heap memory , on which string variables are put, decreased.
Extype -102 means Virtaul Stack overflow. If this happens, increase Virtual Stack size.
Extype -105 means Virtual Stack size too large. If this appeared, decrease Virtual Stack size.
On Windows OS's, Virtual Stack size exceeding the physical memory does not matter.