If at any point in the code, an error occurs such that processing cannot continue, we retrieve the system error message (if any), and display it along with our own message.
如果代码中任何一处出现了使处理不能继续进行之类的错误，那么我们会检索系统错误消息(如果有的话)，然后将它与我们自己的消息一起显示。
This will occur because of the target System Interfaces inability to understand the message or because the message is causing a processing error within the target System Interface.
这可能是由于目标系统接口无法理解此消息或由于消息导致了目标系统接口内的处理错误而造成的。
At first, the logic behind this sounds reasonable: If you change this data element from optional to required, you essentially duplicate error processing that occurs elsewhere in the system.
首先，整个过程背后的逻辑是合理的：如果您将这项数据元素从可选改为必需，那么您基本上就是复制了系统中其他地方所使用的错误处理过程。
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