# VTK example
**URL:** https://discourse.vtk.org/t/vtk-example/3769
**Category:** Support
**Created:** [July 14, 2020, 11:13am UTC](https://discourse.vtk.org/t/vtk-example/3769 "2020-07-14T11:13:29Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@AmBou99](https://discourse.vtk.org/u/AmBou99)
#### Post date: [July 14, 2020, 11:13am UTC](https://discourse.vtk.org/t/vtk-example/3769/1 "2020-07-14T11:13:29Z")
Hello everyone,
I’m new with vtk and in this forum.
I have a question about the example on the website of VTK like this example : [https://lorensen.github.io/VTKExamples/site/Cxx/IO/JPEGWriter/](https://lorensen.github.io/VTKExamples/site/Cxx/IO/JPEGWriter/)
I use cmake-gui : for the source folder I choose the folder where the cmakefile is here and I create an other folder for the build.
Before that I create an other folder and in this folder I compile vtk (git clone etc.)
When I go in the JPEGWriter/build and I do make nothing append ! When i say nothing append, it’s like you do a “ls” on a empty folder, nothing appends.
So I havn’t an exec to run the example.
Maybe i forget an instruction ?
Thanks for your help !
AmBou99
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [July 15, 2020, 11:28am UTC](https://discourse.vtk.org/t/vtk-example/3769/2 "2020-07-15T11:28:51Z")
Was the configure step of the example successful ?
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### Author:  [@AmBou99](https://discourse.vtk.org/u/AmBou99)
#### Post date: [July 15, 2020, 12:37pm UTC](https://discourse.vtk.org/t/vtk-example/3769/3 "2020-07-15T12:37:39Z")
I try something and now it works !
But i don’t think it is normal.
I have a folder VTK (there are many thing in this folder because I clone with the git)
In this folder I create a folder vtk-build (empty folder).
I extract the JPEGWriter.tar and if I follow the instructions I need to go in the folder build : /JPEGWriter/build
When I am in build I have two choice : 1) if VTK is installed or 2) not installed but compiled somewhere
I am in the choice 2, so I do that : cmake -DVTK\_DIR:PATH=/home/me/vtk\_build …
If I do that in the build folder I have this message :
No source or binary directory provided. Both will be assumed to be the
same as the current working directory, but note that this warning will
become a fatal error in future CMake releases.
CMake Error: The source directory “blabla/JPEGWriter/build” does not appear to contain CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.
But if I do that in JPEGWriter (so I don’t enter in the folder build) it works, I do make and I have a run.
Is it normal ?
Thanks for your answer !
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### Author:  [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [July 15, 2020, 12:52pm UTC](https://discourse.vtk.org/t/vtk-example/3769/4 "2020-07-15T12:52:37Z")
you have to point to your source dir.
cd build
cmake …/