Texas Instruments Titanium TI-89, User Manual

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Memory and Variable Management 697
Memory Error When Accessing an Archived
Variable
An archived variable is treated the same as a locked variable. You can access the
variable, but you cannot edit or delete it. In some cases, however, you may get a
Memory
Error
when you try to access an archived variable.
What Causes the Memory Error?
The
Memory Error
message is displayed if there is not enough free RAM to access the
archived variable. This may cause you to ask, “If the variable is in the user data archive,
why does it matter how much RAM is available?” The answer is that the following
operations can be performed only if a variable is in RAM.
• Opening a text variable in the Text Editor.
• Opening a data variable, list, or matrix in the Data/Matrix Editor.
• Opening a program or function in the Program Editor.
• Running a program or referring to a function.
Note:
A temporary copy lets you open or execute an archived variable. However, you
cannot save any changes to the variable.
So that you don’t have to unarchive variables unnecessarily, the TI-89 Titanium performs
a “behind-the scenes” copy. For example, if you run a program that is in the user data
archive, the TI-89 Titanium:
1. Copies the program to RAM.
2. Runs the program.