HP 48g Graphing Calculator - Manual (Page 76)

Once you’ve initiated the memory reset, the calculator beeps and
displays the following screen:
Memory Reset Prompt
3. Press YES if you want to try and recover the variables you
have stored in HOME and in Port 0. There is no guarantfe
that all of the variables can be recovered. Press N0 to
perform a complete memory reset. This restores the HP 48 to its
factory-default state and clears all user memory.
Responding to Low-Memory Conditions
HP 48 operations .share memory with the objects you create. This
means that the calculator may operate slowly or even fail if user
memory becomes too full. If this happens, the HP 48 returns one of a
series of low memory warnings. These messages are described below in
order of increasing severity.
■ No Room for Last St ack —If there’s not enough memory to save
a copy of the current stack, this message appears when ENTER
is executed. The UNDO operation is disabled when this message
appears.
Remedy: Delete unused variables or unnecessary objects from the
stack.
■ Insufficient Memory—This appears if there isn’t enough
memory to completely execute an operation. If the LASTARG
command is enabled (flag —55 is clear), the original arguments are
restored to t.he stack. If LAST ARG is disabled (flag —55 is set),
the arguments are lost.
Remedy: Delete unused variables or unnecessary objects from the
stack.
5-18 Memory