Setting up a production molecular dynamics (MD) simulation can sometimes feel like a daunting process, especially when it comes to ensuring that the input data you’re using is the correct one. SAMSON’s GROMACS Wizard simplifies this process significantly, allowing you to focus on the science rather than the technicalities. Let’s break down how to select the correct input structure for your MD simulation effortlessly.
Streamlined Input Selection
When launching the production MD step in GROMACS Wizard, you need to provide one of two inputs:
- The path to a GRO file generated from the NPT equilibration step or from a previous production MD run.
- The path to a batch project that has already been equilibrated or is the result of a prior production MD simulation. For more details, you can refer to the Batch computations tutorial.
To make this even simpler, GROMACS Wizard includes an auto-fill feature. By clicking the auto-fill button (
), the system will automatically populate the path based on the previous step. Whether you’re using a GRO file or a batch project, this tool ensures that the input is correctly aligned with the earlier simulation stages.
Manual Input Options
Prefer to manually select your input file? No problem. Simply click on the … button to explore and pick your GRO file directly. You have complete control over what to use, allowing you to ensure every detail matches your simulation’s needs.

What Makes This Step Critical?
The choice of input structure determines the trajectory of your simulation. By ensuring the selected input comes from the NPT equilibration or aligns with the objective of your production MD run, you maintain the integrity of the simulation. This reduces the possibility of errors and misaligned parameters.
With SAMSON’s GROMACS Wizard, the process becomes intuitive. The auto-fill feature in particular can save valuable time, while still allowing for flexibility and manual input as needed.
Take the Next Step
Equipped with the right input structure, you’re ready to move on to parameter settings and finally launch your MD simulation. Learn more about configuring parameters, choosing simulation modes (local, cloud, or generating inputs), and analyzing your results in the full tutorial documentation.
For detailed step-by-step instructions, visit the original documentation page: GROMACS Wizard – Production Molecular Dynamics Simulation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can get SAMSON at https://www.samson-connect.net.
