Dynamic memory allocation is off by default. System storage space for all instances is pre-allocated at start-up. This implies marking the OIM to define the maximum number of instances needed for each class. Note that MC-3020 intelligently determines rational defaults for instance and event populations. Sophisticated analysis is performed to size instance, event and queue populations across multiple components. Marking is used to dial these in tightly. Dynamic memory allocation can be enabled with marking.

Some platforms have no real time clock. Therefore date and time may not be available in standard Gregorian or Caesarian form.

State machines are optimized for speed rather than space.

Navigations of composed associations must explicitly use the ``real'' (non-composed) association formalizations.

Association conditionality is not enforced by the model compiler.

MC-3020 attempts to optimize select any [inst_ref] from instances of [key_letters] where [where clause] for code size when the where clause is checking for equality of the identifier. Future versions of MC-3020 may provide advanced (hashed) searching techniques to optimize the blind selections for speed. In MC-3020, certain limitations apply to the selection optimization when unnecessary parentheses are used in the where clause expression. To guarantee the best optimization, avoid unnecessary parentheses in where clauses.

Blind selections following a create and in the same scope as the create may not see the newly created instance in the extent.

create object instance of keyletters (create with no return value) is allowed only when the identifier of class keyletters is of type unique_ID.