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Editorial Team
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Asked: 2026-05-17T15:17:30+00:00

I have a problem with building performance profile for my .net web app See

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I have a problem with building performance profile for my .net web app

See my steps below:

1) Setup global variables

VSPerfCLREnv /traceon
VSPerfCLREnv /globaltranceon

2) Instrument assemblies

vsinstr “path to my assembly”

3) Restart iis

iisreset

4) Start profiling

VSPerfCmd /start:trace /output:traceoutput.vsp

5) Open app in browser, perform some actions on it

6) Stop profiling

VSPerfCmd /shutdown

It creates the file traceoutput.vsp, but when I try to open it in visual studio, it whows “Error Error VSP1734 : File contains no data: C:\Program Files\Microsoft Visual Studio 9.0\Team Tools\Performance Tools\traceoutput.vsp” message.

I was successfull in console application profiling. So, I have this problem only for assemblies in web app.

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1 Answer

  1. Editorial Team

    I’ve resolved this issue. I just forgot to specify the user.
    I have had to write

    VSPerfCmd /start:trace /output:traceoutput.vsp /user:ASPNET
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