Changing OpenStudio.idd file

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I want to change the minimum value required for the Space Infiltration object, which requires editing the .idd file. However, when I go to save my edits, I am giving a warning that I do not have access to this file even though I am the administrator for this computer. Has anyone else come across this (or similar) problem? How do I resolve it?

OpenStudio does not support changing the IDD file at runtime the same way that EnergyPlus does. This is because the OpenStudio IDD is read at compile time and built into the OpenStudio binaries. If the OpenStudio IDD values are too restrictive, I would file an issue on the OpenStudio github issues page.