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Acumatica 26R2 – Modern UI Customization and Compatibility

  • September 14, 2026
  • 0 replies
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Hi Acumatica Community,

With Acumatica 26R2, I’m interested in hearing from other developers about their experience with the latest Modern UI changes and customization compatibility.

For those who have already started working with 26R2:

  • Have you experienced any breaking changes in existing customizations?
  • Are there any changes in RowSelected, FieldSelecting, actions, or event handling that developers should be aware of?
  • How are your existing Classic UI customizations behaving after upgrading to 26R2?
  • Have you encountered any issues while publishing customization packages containing Modern UI files?
  • Are there any recommended approaches for maintaining compatibility across 25R2 and 26R2?

I would especially appreciate feedback from anyone who has already upgraded a development or test instance to 26R2.

What are the major 26R2 customization challenges or changes you have encountered so far?