I'm from Argentina and my English isn't good.. but i'll try to explain the situation...
When i validate the script using the workbench, this works fine, but when i use the Conductor on it, return an error...
The script works with session type "Universal" because the conection use winsock.
The error happen when i call function DO_ExtractString:
Hello and welcome. We can try to help, but my experience so far is only with WWW middleware... but a few questions may help us answer you.
What version of QALoad are you using?
Does the error from Conductor happen for every virtual user, or just some of them, or 1, etc.
You mention that you are using Universal session and Winsock middleware. What type of application is it?
This could be a scripting (user) error, and QALoad bug, or an actual application issue due to load.
The basic idea is to open the .rip file in Analyze (or in the player PC's QALoad\Logfiles directory) created during playback in Conductor and see what the request and response header/page look like (if Analyze doesn't display the page, paste the text to an HTML file).
The most likely culprit (for me anyhow) is missed or misapplied business logic or some other invalid data being used for the QALoad script. Second is that the server reponse is OK, but the validation text is not correct or as expected.
A problem is a difference between what is perceived and what is desired, that
we want to reduce (Dewey 1933)