不知什么时候,打开STEP7软件时会弹出对话框:open project (257:5),对话框内容显示:One or more objects or a type cannot be represented。Server 's7h2a42x.dll' for _s7H_HSP_ENTER_CSM_DP_SlAVE_CT objects could not be loaded, make sure the required software packgaes are installed.
请问这是怎么回事呀!该怎么解决呢?谢谢。