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

• 
  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!

  Jessica R March 13, 2017 13:43

  - 0 +
• 
  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

  sramirez March 13, 2017 13:51

  - 0 +
• 
  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!

  Jessica R March 13, 2017 15:17

  - 0 +
• 
  Thank you, running as 32bit solved my issue.

  sramirez March 14, 2017 08:04

  - 0 +
• 
  Thanks for the update, that's great to hear!

  Jessica R March 14, 2017 11:57

  - 0 +

Add comment

Please sign in to leave a comment.