Technical Reference Manual - InduSoft

Troubleshooting
A. Microsoft Internet Information Services (IIS) has a configuration option to keep HTTP connections alive.
When this option is enabled, it may conflict with Thin Clients that are connecting via proxy. To disable this
option:
1. Start Internet Services Manager.
2. In the Internet Information Services window, open the local server ( * server name ).
3. Right-click on Default Web Sites and select Properties from the shortcut menu. The Default Web Site Properties
dialog is displayed.
4. Select the Web Site tab of the Default Web Site Properties dialog.
5. In the Connections pane of the Web Site tab, uncheck the HTTP Keep-Alives Enabled option.
6. Click OK to save the change and close the dialog.
Q. How do I send an email from the IWS project
A. Follow the procedure below:
• Execute the function CNFEMail(strSMTP,strFrom,strPOP3,strUser, strPassword,numTimeOut) to
configure the overall parameters used to send emails. After executing this function once, the parameters
set by it are kept in the system until the project is shut down. So, most projects execute this function just
once, after starting the project;
• Execute the function SendEMail(strSubject,strMessage,strTO) and/or
SendEMailExt(strSubject,strMessage,strTO,strCC,strBCC, strFile1,...,strFileN) each time
that an email message must be sent. The main difference between both functions are listed in the next
table:
Characteristic SendEmail SendEmailExt
Execution Synchronous Asynchronous
Supports Subject text Y Y
Supports Message text Y Y
Supports TO addresses Y Y
Supports CC addresses N Y
Supports BCC addresses N Y
Supports attached files N Y
Q. The runtime task (TCP/IP, OPC, DDE, ODBC, etc) does not work.
A. Make sure the runtime task is set to Automatic in the Execution Tasks dialog (Tasks on the Home tab of the
ribbon). Select a runtime task that must be executed (for example, TCP/IP Server), click Startup, and then set it
as Automatic.
Q. The browser from the Thin Client does not display the screen and launches a warning message regarding
ISSymbol.ocx.
A. Make sure the runtime task is set to Automatic in the Execution Tasks dialog (Tasks on the Home tab of the
ribbon). Select a runtime task that must be executed (for example, TCP/IP Server), click Startup, and then set it
as Automatic.
Q. The browser of the Thin Client launches an error message missing the ISSymbol.ocx and does not display
the screens from the Server.
A.ISSymbol.ocx is the ActiveX object used by the browser from the Thin Client to view the web pages. If
the Thin Client is connected to the Internet, the ISSymbol.ocx control is automatically downloaded and
registered in the Thin Client station. Otherwise, it's necessary to copy it to the \WinNT\System32 folder of the
Thin Client station and register it manually. Once it is registered your browser will be able to see the pages.
Note: Use the command regsvr32 ISSymbol32.ocx to register the ActiveX component in the Thin
Client.
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