Otherwise, an error message such as "Invalid application space message" will pop up.

否则，就会弹出如“Invalid application space message”的错误消息。

youdao

A project in South Africa, Project Masiluleke, put an HIV awareness message in the unused space of certain text messages.

VOA: standard.2010.02.24

The company also launched a new feature on Wednesday called ShareDesk CONNECT, which enables users to see who works in a given space and message them.

FORBES: Startups: Monetize Your Extra Space With ShareDesk

Given the pager's limited message space, American teens have devised a special numerical code.

BBC: The pager rings off

If you thought cloud writing was cool, then how about a message from space burnt into the night sky?

ENGADGET: Japan's LED-stacked cubesat will burn Morse code into the heavens