I am able to successfully save a data collection as a json file using the HB Dump Objects component, but I can’t load it back into Grasshopper with the HB Load Objects component:
Yea, those components are only meant to serialize honeybee objects and not ladybug ones. People keep asking for a way to serialize the Ladybug data collections, though. Here are some previous posts that will help you:
If we’re going to add something official for this, let me know if you prefer serializing to CSV over JSON.