Firstly, thank you for updating MUIO v.5.4. It took us a while to fully installed.
After following the hands-on documents from the Climate Compatible Growth programme, I found out that results differ from the graph on the Hands-on 6 from the year 2026 and afterwards. And even with different performance compared to the graph on the Hands-on 8.
Therefore, my questions are 1) whether it updates equitions or default parameters in the latest MUIO when compared to MUIO v.5.0.0? 2) do I miss something in the data preperation OSeH08?
Dear @Vicki, There were a couple of changes in the code, but they should not create any differences for a simple exercise like this one. I would recommend repeating the exercise and taking care when transferring the input data.
I have this too. Try to install the older version, but didn’t work. Try to rebuild the model from scratch like many times, the result is still the same. I think there is a fundamental changes in the v5.4. that should be adjusted, to reflect the version of the exercise (v5.0). Or maybe the hands on exercise need to be updated to reflect the newer version of the app. Now i don’t know, should I continue learn this or not, or find a newer and more relevant one.
Thank you for looking into this. After several days of trying, I was still facing the same issue, which has been quite frustrating.
Fortunately, my learning progress finally moved forward after two specific steps:
ignoring my previous errors from Hands‑on 7, and
following the most recent YouTube tutorial.
My reflections are the following:
When the input data is clear and correct (as in “Tutorial to Create a Basic OSeMOSYS Model Using MUIO”), working with MUIO v5.4 becomes much smoother. This allows me to focus on the critical aspects of system optimization rather than troubleshooting basic model issues.
After reaching Hands‑on 13, I realized that some of the errors came from missing or incorrect inputs in the data preparation for Hands‑on 7. For example, the parameter “TAnnualMaxCapInv” was missing.
As a beginner with this tool, I do not yet have the full capacity to calibrate all datasets on my own. I would therefore be grateful if you could review the data preparation files on your side and update them as needed using MUIO v5.4.
Dear all, I have received this feedback from other students. Indeed, there were some important changes in the code that are affecting the final results. I sincerely apologize for the inconvenience. We will be working on updating the hands-on exercises to reflect this new version of the model.
In the meantime, I encourage you to continue finalizing the course, as the modelling logic and workflow remain the same, even though the results may differ.
Thank you for your reply. I just realised that the launch of MUIO 5.5 and the update accordingly. After having both MUIO 5.5 and MUIO 5.4 on my laptop, the previous models made under MUIO V.5.4 are all gone. Would you please instruct me on how to find out these missing models and make them editable in MUIO 5.5?
Unfortunately, the new version of MUIO overwrites the previous installation, including all existing models. For this reason, it is critical that users archive their legacy models before upgrading.
The restoration process of model archives executes several scripts designed to ensure backward compatibility. These scripts often introduce new data structures that were not present in earlier model files, and they are applied automatically during the restoration.
If the new version of MUIO is installed without first backing up the old models, those models cannot be recovered and are permanently lost.
