# RadiantVFlow Blocks simulation to OSM

**URL:** <https://discourse.ladybug.tools/t/radiantvflow-blocks-simulation-to-osm/40844>\
**Category:** ironbug\
**Tags:** ladybug\
**Created:** [October 11, 2026, 9:13am UTC](https://discourse.ladybug.tools/t/radiantvflow-blocks-simulation-to-osm/40844 "2026-10-11T09:13:44Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Emesisblue](https://discourse.ladybug.tools/letter_avatar_proxy/v4/letter/e/ee59a6/32.png) [@Emesisblue](https://discourse.ladybug.tools/u/Emesisblue)\
**Post date:** [October 11, 2026, 9:13am UTC](https://discourse.ladybug.tools/t/radiantvflow-blocks-simulation-to-osm/40844/1 "2026-10-11T09:13:45Z")

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Good evening, sorry to bother you. I’m trying to run a simulation with RadiantVFlow. I believe I’ve set up the hot and cold water loops correctly and connected the branches, using Internal Source components. The problem is that when I export the model with this configuration to OSM, Rhino and Grasshopper close automatically, and I don’t get any error in the panel\_report. At this point I think it might be an issue with the model configuration. If anyone can offer some advice, I’d be very grateful – and you’ll be cited in my master’s thesis 🙂

 ![pic](https://discourse.ladybug.tools/uploads/default/original/3X/4/3/43e59c004b20b270d605a0da450fa46a20984e6d.png)

 ![pic2](https://discourse.ladybug.tools/uploads/default/original/3X/1/2/1213354006230f6466577cc6a4e92747e2d21998.png)