c# - 连接到 SAP Quality System 时，抛出 Connection Exception 异常

Question

在与 SAP 质量系统连接时，它给出的异常是 ConnectionException 被捕获。详情如下：

详细信息：错误代码=RFC_OK。错误组=RFC_ERROR_COMMUNICATION。SapErrorMessage=SAP_CMINIT3 : rc=20 > 连接到 SAP 网关失败

Connect_PM GWHOST= IP地址地址，GWSERV=sapgw02，SYSNR=02

LOCATION CPIC (TCP/IP) 在本地主机上使用 Unicode

错误合作伙伴“IP地址”未到达

App.Config 中的连接字符串是：

value="sap://CLIENT=643;SYSTEM ID=QSG;LANG=;@A/**IPAddress**/01" 
value="sap://CLIENT=643;SYSTEM ID=QSG;LANG=;@A/**IPAddress**/02" 

key="userid" value="UserName" 
key="password" value="Password" 

程序代码

SAPBinding binding = new SAPBinding();
//SAPBinding binding1 = Skelta.SAPConnector.SAPAdapter.SAPConnection.binding;

binding.ReceiveTimeout = TimeSpan.MaxValue;
binding.SendTimeout = TimeSpan.MaxValue;
binding.EnableBusinessObjects = true;
binding.EnableSafeTyping = true;

EndpointAddress address = new EndpointAddress(SAPConnectionString);
ChannelFactory<IRequestChannel> factory = new ChannelFactory<IRequestChannel>(binding, address);

// add credentials
factory.Credentials.UserName.UserName = SAPUserName;
factory.Credentials.UserName.Password = SAPPassword;

// Open client
factory.Open(TimeSpan.MaxValue);

//get a channel from the factory
irc = factory.CreateChannel();
//open the channel
try
{
    irc.Open(TimeSpan.MaxValue);
}

请帮我