Getting common .NET errors only while playing the script load

[Guest kaushalparik27]

Hello Members,

This is my first post and first time I am working with WAPT tool for performance testing.

I am facing some problems here.

 

When I record my script - I browse thru my application pages do some activity 100% successfully. But, when I try to run the recorded script (with single user load) I am getting common ASP.NET errors like "object reference not found", "string was not in a correct format", "viewstate mac failed" etc.. Please note that I am not receiving this errors while I manually browse the application pages either while recording the script or while manual testing. I also noticed that the most errors are coming in Iframes. Please note that my application is based on dynamic pages which dynamically generates XML and transform the XML contents via XSLT pages on a single page everytime. Meantime it also loads different-different page in iframes based on the requirement of current page.

 

Anybody having any clue on this?