How To Stop Lookout Web Client Crashing IE Web Browser

[Brett Sheeran]

Hi,

I am using Web Client with Lookout. My problem is I can only load a panel within Internet Explorer once. If I reload the URL within the same session then Internet Explorer crashes.

Can anyone offer me advice to fix this problem please?

Software is as follows:
- Lookout V 6.0 (build 5)
- Browser: Internet Explorer 6.0.28
- Web Server: Tomcat 5.5.7

The steps I took are as follows:
1. Created Process
2. Set up File-> Web Server Options->Export Directory to:
c:\telemetrysms\webapps\root\user\fishfarmlive\
(where “c:\telemetrysms\webapps” is Tomcat webapps folder)

Set up server URL to:
http://HOSTNAME/user/fishfarmlive/
(where “HOSTNAME” is the server name)

3. Export Web Server Files

4. Start IE and open web page. My panel displays correctly (with live data), although the only alarm Lookout displays is “The remote position source is not writable”.

5. HOWEVER, when I reload the page in IE the browser will always go blank for several seconds and then crash (with no error message).

Furthermore…
As a test I created a simple test process with nothing but one panel containing a single line of static text. This simple project also crashes.

This computer also has Lookout 5.1 installed. And projects created in 5.1 only crash the browser very occasionally.

Any suggestions (about the crashes or the missing alarms) would be greatly appreciated?

Thanks.

Regards Brett Sheeran

[Danny G.]

Brett,

I have some info for you regarding the web client. I am including links to two documents that have information that will help you with your problem. The first document is good info about developing a web client application and the second has information directly pertaining to the IE crash that is occurring. It also has other troubleshooting information. I would also recommend checking the firewall on the computer. It windows security settings also have to be set to low in order for web client to communicate correctly.

Deploying a Lookout Application


Lookout Web Client Troubleshooting

Regards,

Danny G
Applications Engineer
National Instruments

[Brett Sheeran]

I haven’t fixed the problem, but I suspect it may have something to do with having Lookout 5.1 and 6.0 installed on the same computer.

I have unsuccessfully tried several of the suggestions under the links including, uninstalling/reinstalling, installing 4.5 (didn’t work at all), copying lookout.sec and removing the class files.

I am unable to run the web-client on two computers that have both Lookout 5.1 and 6.0 installed. However, I *am* able to run the web-client on two other computers., one which has only Lookout 6.0 installed and one that has nothing but the web-client. I believe the client computers on which we will ultimately deploy the web-clients will have no other NI software besides the web-client and so I hope they will not cause any problems.