When Vuser getting fail? what are the different possibilities?

Thanks a lot shlomini.
I would like to know how "- failures to login due to wrong login details" makes Vuser to be failed? Is this login failure in the application like login window.

[QUOTE=shlomini;29663]There can be numerous reasons that no one can predict now

The most common ones, I can think of are:
1. Scripter faults
- script which is not well correlated
- wrong values sent to the server, hence the server throws an exception and script may fail
- failures to login due to wrong login details
- transactions not ended properly in the script
- more...

2. App errors
Application returns errors from different kinds (HTTP 404, HTTP 500, HTTP 501, other protocols errors), in such cases, the problem might be in the script or in the application as it can't handle the load

Bottom line: there are many reasons, you should understand your scripts very well and what they simulate in the application in order to debug such issues

shlomini[/QUOTE]