Hi guys!! Working with Excel Exporter, I found that a workmate changed the domain model, so I have gone to the Mx Model Reflection actualized it and then redid the columns that were affected, but still it gives me a NullPointerException, I have made a research and found this 2 forum answers: https://community.mendix.com/link/space/studio-pro/questions/89920 https://community.mendix.com/link/space/java-actions/questions/96690 So my question is every time that someone will change the domain model we should remake the Excel Exporter from the very beginning? Thanks in advance! Adolfo