Texas Instruments TI-89 Manual Book page 58

Message
Tasks 1.0 requires OS
Version 2.05 or higher.
File cannot be read. It
has an unknown
format.
Task does not exist!
Not enough memory to
save changes. Your
tasks will not be
modified.
TI-89 / TI-92 Plus / Voyage™ 200 PLT Organizer Suite
Description
The Tasks App requires Advanced
Mathematics Software Version 2.05 or later to
run. Tasks are deleted from the handheld
device.
Install the Advanced Mathematics Software
Version 2.05 operating system, available from
education.ti.com/softwareupdates
Occurs when the Tasks App does not
understand the format of a tasks file.
Occurs when the Planner App launches the
Tasks App and requests a task to be edited
that does not exist.
Occurs when the Tasks App runs out of
memory before it can save the tasks files. In
normal circumstances, the Tasks App limits
operations to those it can successfully save.
However, in rare circumstances, memory can
be exhausted and all changes are not saved.
The Tasks App attempts to detect this and
leaves previous tasks intact.
Page 58