# Difficulty installing **URL:** \ **Category:** User discussions\ **Created:** [September 23, 2024, 5:57am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209 "2024-09-23T05:57:11Z")\ **Posts on this page:** 18\ **Page:** 1
**Author:** ![Wynton](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@Wynton](https://gromacs.bioexcel.eu/u/Wynton)\ **Post date:** [September 23, 2024, 5:57am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/1 "2024-09-23T05:57:11Z")
GROMACS version: GROMACS modification: Yes/No Here post your question wynton@wyntonnewlaptop:~ sudo apt install build-essential cmake git libfftw3-dev libgsl-dev Reading package lists... Done Building dependency tree... Done Reading state information... Done E: Unable to locate package build-essential E: Unable to locate package cmake E: Unable to locate package libfftw3-dev E: Unable to locate package libgsl-dev wynton@wyntonnewlaptop:~ sudo apt install build-essential cmake git libfftw3-dev libgsl-dev Reading package lists… Done Building dependency tree… Done Reading state information… Done E: Unable to locate package build-essential E: Unable to locate package cmake E: Unable to locate package libfftw3-dev E: Unable to locate package libgsl-dev Rgds, Wynton ---
**Author:** ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)\ **Post date:** [September 23, 2024, 6:27am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/2 "2024-09-23T06:27:56Z")
Hi, This problem is not related to GROMACS installation as such. You are having difficulties installing the required packages. What Linux distribution are you using and which version? ---
**Author:** ![Wynton](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@Wynton](https://gromacs.bioexcel.eu/u/Wynton)\ **Post date:** [September 28, 2024, 4:20pm UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/3 "2024-09-28T16:20:06Z")
Ok, successfully installed. but gmx.exe is not found in the bin. ---
**Author:** ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)\ **Post date:** [September 30, 2024, 8:18am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/4 "2024-09-30T08:18:30Z")
By “bin” do you mean the installation directory? To which directory did you install? Is there a `gmx` file there? ---
**Author:** ![Wynton](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@Wynton](https://gromacs.bioexcel.eu/u/Wynton)\ **Post date:** [September 30, 2024, 8:30am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/5 "2024-09-30T08:30:34Z")
yes, the folder bin in it. i installed to C:\Softwares\gromacs-2024.3\fftw-install. ---
**Author:** ![Wynton](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@Wynton](https://gromacs.bioexcel.eu/u/Wynton)\ **Post date:** [September 30, 2024, 8:31am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/6 "2024-09-30T08:31:08Z")
no there is no gmx file ---
**Author:** ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)\ **Post date:** [September 30, 2024, 8:41am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/7 "2024-09-30T08:41:25Z")
So is `CMAKE_INSTALL_PREFIX` set to `C:\Softwares\gromacs-2024.3\fftw-install`? Or is that just the directory where you ran the compilation? The installed files should be in the `bin/` subdirectory in the directory specified by `CMAKE_INSTALL_PREFIX`. ---
**Author:** ![Wynton](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@Wynton](https://gromacs.bioexcel.eu/u/Wynton)\ **Post date:** [October 1, 2024, 5:32am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/8 "2024-10-01T05:32:37Z")
C:\Softwares\gromacs-2024.3\cmake, no CMAKE\_INSTALL\_PREFIX present. ---
**Author:** ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)\ **Post date:** [October 1, 2024, 7:02am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/9 "2024-10-01T07:02:56Z")
If there is no CMAKE\_INSTALL\_PREFIX it will be installed in the default system-wide installation directory. I presume that would be `C:\Program Files\gromacs` (or something similar) on Windows. ---
**Author:** ![Wynton](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@Wynton](https://gromacs.bioexcel.eu/u/Wynton)\ **Post date:** [October 1, 2024, 7:16am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/10 "2024-10-01T07:16:48Z")
C:\Program Files\CMake\bin (Attachment Outlook-3dhisnbk.webp is missing) (Attachment Outlook-rdwgtlaa.webp is missing) (Attachment Outlook-kpsh5bus.webp is missing) ---
**Author:** ![Wynton](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@Wynton](https://gromacs.bioexcel.eu/u/Wynton)\ **Post date:** [October 1, 2024, 7:17am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/11 "2024-10-01T07:17:35Z")
cmake.exe ---
**Author:** ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)\ **Post date:** [October 1, 2024, 7:39am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/12 "2024-10-01T07:39:39Z")
I don’t understand. You should not be looking for GROMACS installations in the system-wide cmake directory. I think it would be easier if you describe your installation procedure (of GROMACS) all the way from the start. Please provide the exact commands that you have used and the current working directories when you executed those commands. ---
**Author:** ![Wynton](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@Wynton](https://gromacs.bioexcel.eu/u/Wynton)\ **Post date:** [October 1, 2024, 7:55am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/13 "2024-10-01T07:55:17Z")
cmake …\gromacs-2024.3 ^ -G “Visual Studio 17 2022” ^ -A x64 ^ -DGMX\_DOUBLE=ON ^ -DGMX\_BUILD\_OWN\_FFTW=OFF ^ -DREGRESSIONTEST\_DOWNLOAD=ON ^ -DFFTW\_INCLUDE\_DIR=“C:\Softwares\gromacs-2024.3\fftw-install\include” ^ -DFFTW\_LIBRARY=“C:\Softwares\gromacs-2024.3\fftw-install\lib\fftw3.lib” current working directories when you executed those commands: C:\Program Files\CMake\bin, C:\Softwares\gromacs-2024.3, C:\Users\wyntonlam\gromacs-2024.3, C:\Users\wyntonlam\gmxapi\_env, C:\gromacs-2024.3 ---
**Author:** ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)\ **Post date:** [October 1, 2024, 8:45am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/14 "2024-10-01T08:45:26Z")
So, have you run `make` and `make install` to actually build and install GROMACS? `make install` would need admin privileges, unless you specify a CMAKE\_INSTALL\_PREFIX that is in your user home directory. You might want to run `make check` as well to verify that the tests are passing. ---
**Author:** ![Wynton](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@Wynton](https://gromacs.bioexcel.eu/u/Wynton)\ **Post date:** [October 1, 2024, 11:57am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/15 "2024-10-01T11:57:32Z")
> [@MagnusL](#): > > make install C:\Softwares\gromacs-2024.3\build\>cmake … -DGMX\_DOUBLE=ON -DGMX\_BUILD\_OWN\_FFTW=OFF -DGMX\_FFT\_LIBRARY=fftw3 -DFFTW\_INCLUDE\_DIR=“C:\Softwares\gromacs-2024.3\fftw-install\include” -DFFTW\_LIBRARY=“C:\Softwares\gromacs-2024.3\fftw-install\lib\libfftw3.lib” -DGMX\_BUILD\_SHARED\_EXE=ON -DGMX\_USE\_OPENMP=ON -DCMAKE\_INSTALL\_PREFIX=“C:\Softwares\gromacs-2024.3\install” -DCMAKE\_VERBOSE\_MAKEFILE=ON – Selecting Windows SDK version 10.0.22621.0 to target Windows 10.0.19045. – Could not identify number of AVX-512 units - detection program missing compilation prerequisites CMake Error at cmake/FindFFTW.cmake:104 (message): Could not find fftw\_plan\_many\_[r2c|c2r] in C:/Softwares/gromacs-2024.3/fftw-install/lib/libfftw3.lib, take a look at the error message in C:/Softwares/gromacs-2024.3/build/CMakeFiles/CMakeError.log to find out what went wrong. If you are using a static lib (.a) make sure you have specified all dependencies of fftw3 in FFTW\_LIBRARY by hand (e.g. -DFFTW\_LIBRARY=‘/path/to/libfftw3.so;/path/to/libm.so’) ! Call Stack (most recent call first): cmake/gmxManageFFTLibraries.cmake:64 (find\_package) CMakeLists.txt:872 (include) – Configuring incomplete, errors occurred! ---
**Author:** ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)\ **Post date:** [October 1, 2024, 1:07pm UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/16 "2024-10-01T13:07:10Z")
So, it fails during compilation. It seems like your FFTW library doesn’t work. ---
**Author:** ![Wynton](https://avatars.discourse-cdn.com/v4/letter/w/e8c25b/32.png) [@Wynton](https://gromacs.bioexcel.eu/u/Wynton)\ **Post date:** [October 2, 2024, 6:35am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/17 "2024-10-02T06:35:41Z")
so what should i do? ---
**Author:** ![MagnusL](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/magnusl/32/2380_2.png) [@MagnusL](https://gromacs.bioexcel.eu/u/MagnusL)\ **Post date:** [October 2, 2024, 6:49am UTC](https://gromacs.bioexcel.eu/t/difficulty-installing/10209/18 "2024-10-02T06:49:33Z")
I haven’t built GROMACS or FFTW on Windows for a very long time, so I might not be the best person to help you. But following the instructions at [Installation guide - GROMACS 2024.3 documentation](https://manual.gromacs.org/documentation/current/install-guide/index.html#building-on-windows). How did you build the FFTW library? Did you follow the instructions at [Installation guide - GROMACS 2024.3 documentation](https://manual.gromacs.org/documentation/current/install-guide/index.html#using-fftw), [Installation and Customization (FFTW 3.3.10)](http://www.fftw.org/doc/Installation-and-Customization.html#Installation-and-Customization) and [Installation on non-Unix systems (FFTW 3.3.10)](http://www.fftw.org/doc/Installation-on-non_002dUnix-systems.html)? Otherwise, can you use the built-in fftpack instead?