You will need to do that by adding the message to the XML instance to be returned; a regular text error message won't show up in the form.

我们需要通过向将要返回的XML实例中添加消息来实现这一目的；表单中不会显示常规的文本错误消息。

youdao

The code must select only ELEMENT type nodes, because TEXT nodes do not support this method and produce a non-recoverable error in Perl.

在代码中只能选择element类型的节点，因为该方法不支持TEXT节点，并且会在Perl中产生一个不可恢复的错误。

youdao

Shell redirection can be handy in capturing standard program output, error messages from a program, or both to text files.

Shell重定向可以方便地将标准程序输出、程序错误消息或者这两者捕获到文本文件。

youdao