ASPX - profiler will not run due to 'incorrect format'

sramirez

I have a ASPX application that I am trying to run the performance profiler on but I get this error when launching ants

I am running the ANTS, Launch ANT performance profiler menu option in VS2015.

Could not load file or assembly 'file:///C:UserssramirezAppDataLocalTempTemporary ASP.NET Files
oot82292612874ac5cApp_global.asax.wsxkf9ke.dll' or one of its dependencies. An attempt was made to load a program with an incorrect format.

Can anyone tell me what I need to do?

When I run the application in debug mode in VS 2015 it runs fine.

I am running the 14 day free trial.

Jessica R

Thanks for your post and so sorry to hear you're running into an issue! To help us get a better idea of what's going wrong, can I please check:

- Just to confirm, when you normally launch your application, it runs with IIS? When the profiler launches it, is it also using the ASP.NET - IIS option?
- Does the application normally run as 32-bit or 64-bit? When the profiler launches the web application, is the process running with the correct bitness (you can check from Task Manager -- if it is running as 32-bit, it will either have an asterisk * or "(32-bit)" at the end of the name)
- Does the error happen if you use the "Method level - only methods with source" profiling mode? Does it still happen if you use Sampling profiling mode?

Thank you!

sramirez

It is running with IIS Express, both when it runs successfully (from VS2015) and when it runs ANTS.
It is running with ANY PROCESSOR (32bit according to Task Manager

I tried the sampling mode and got
Could not load file or assembly 'file:///C:UserssramirezAppDataLocalTempTemporary ASP.NET Files
oot82292612874ac5cApp_global.asax.6rta2xuq.dll' or one of its dependencies. An attempt was made to load a program with an incorrect format.

Here is the DOS window that opens when I ran the sampling mode

Copied template config file 'C:Program FilesIIS ExpressAppServerapplicationhost.config' to 'C:UserssramirezAppDataLocalTempiisexpressapplicationhost2017313175022745.config'
Updated configuration file 'C:UserssramirezAppDataLocalTempiisexpressapplicationhost2017313175022745.config' with given cmd line info.
Starting IIS Express ...
Successfully registered URL "http://localhost:8013/" for site "Development Web Site" application "/"
Registration completed
IIS Express is running.
Enter 'Q' to stop IIS Express
Request started: "GET" http://localhost:8013/
Request ended: http://localhost:8013/ with HTTP status 500.0
Request started: "GET" http://localhost:8013/favicon.ico
Request ended: http://localhost:8013/favicon.ico with HTTP status 500.0

Jessica R

Thanks for those details!

Just to confirm, does it run as 32-bit both when you run it normally from VS and when ANTS launches it?

I just want to double check as the usual cause of this error is if the web application needs to run as 32-bit but the profiler launches it as 64-bit.

If it normally runs as 32-bit, can you kindly open your solution, and click on ANTS>Launch ANTS Performance Profiler? Then when the settings for the profiling session come up, can you please click on "Show start URL options" (under the web application name/path textbox) and double check that the "Run application as 32-bit" option is enabled before starting the session?

Please let me know if that helps or not!

sramirez

Thank you, running as 32bit solved my issue.

Jessica R

Thanks for the update, that's great to hear!