计算机名如果是有非法字符的话应该是每次都有问题吧，而不是有的时候出现吧？我用OPC client测试的时候是没有问题的，就是使用一段时间就会出现内容如下：
The DEMO period has expired on one or more loaded drivers or plug-ins. if one of our drivers or plug-ins can help your communications needs please call technical support to purchase a license.this message does not apper when all drivers and plug-ins used by your application are registered.

每次出现的就是这一串英文提示，请各位帮忙看看，谢谢