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I figured out the issue. I was deleting a cooling coil from the text editor without deleting the associated inlet and outlet nodes. Once I followed the OS IDs to the inlet and outlet nodes and deleted them OpenStudio no longer crashed when opening the HW loop.

image description

It may seem strange that a cooling coil affected the HW loop, but this coil was actually placed on the HW loop originally with a measure and subsequently deleted and replace with a DX cooling coil.

Now I am getting the same error when I run a measure to add VAV boxes and reheat for multiple zones. This measure worked great in the early versions of open studio. This crash is really frustrating because it doesn't give any information as to why it crashes.

This worked for a while though: I figured out the issue. I was deleting a cooling coil from the text editor without deleting the associated inlet and outlet nodes. Once I followed the OS IDs to the inlet and outlet nodes and deleted them OpenStudio no longer crashed when opening the HW loop.

image description

It may seem strange that a cooling coil affected the HW loop, but this coil was actually placed on the HW loop originally with a measure and subsequently deleted and replace with a DX cooling coil.

Now I am getting the same error when I run a measure to add VAV boxes and reheat for multiple zones. This measure worked great in the early versions of open studio. This crash is really frustrating because it doesn't give any information as to why it crashes.

This worked for a while though: I figured out the issue. I was deleting a cooling coil from the text editor without deleting the associated inlet and outlet nodes. Once I followed the OS IDs to the inlet and outlet nodes and deleted them OpenStudio no longer crashed when opening the HW loop.

image description

It may seem strange that a cooling coil affected the HW loop, but this coil was actually placed on the HW loop originally with a measure and subsequently deleted and replace with a DX cooling coil. coil.