Apple PowerBook 520 Specifications download pdf (Page 128)

Application programs

A program won’t open.

m Some programs can’t be opened from a locked floppy disk. Make sure the

disk is unlocked.

m The program may be damaged. Recopy it from a known good source (such

as the original program disk).

m There may not be enough memory available to open the program. Quit

other programs or change the program’s memory size in its Get Info

window.

Restart the computer, holding the Shift key down, until you see the

message “Extensions off.” If this solves the problem, drag any control

panels or extensions you recently installed to the Trash.

A program doesn’t work, or malfunctions consistently.

m You may have more than one copy of the program on your hard disk.

Remove extra copies by dragging them to the Trash.

m Your version of the program may not work with your system software.

Check with the software manufacturer to see which version of the program

you should be using.

m The program may be allocated less memory than it needs to work with

your documents. Choose Get Info from the File menu and increase the

memory size.

A message says that a program could not be found.

m You may be trying to open a document created with a program you don’t

have on your computer, or created with a different version of the program.

Obtain the correct program and version. Or open the document with

another program that can read its format. (If another program can open a

document, the program icon becomes highlighted when you drag the

document icon to it.)

You just did something you didn’t mean to do.

m You can usually undo your most recent action. Most programs have an

Undo command in the Edit menu (x–Z). You cannot undo more than one

action.

See the documentation that came with your programs for more information

about their operation and features.

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Chapter 12

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Apple PowerBook 520 Specifications Page 128