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Handle the exception to avoid crashing the application.
…nal root. In USD, we can't add collections to the absolute root `/` so we leverage the internal root (used to work around the limitation with referencing layer in USD that get read of the file's pseudo root) to store the tags/collections.
…alRoot. USD doesnt support writing collections on the absolute root prim (`/`) but IECoreScene does. We have some tags we want to be able to write out of Houdini that should be stored on root loacation (`/`), therefore we leverage the internal root to author the collections and map that to IECoreScene root loaction. Note that there is still a limitation for read tags from the root location and converting them to collections stored on the internal root but the current priority is to support writing out.
Root tag support ie core usd
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Generally describe what this PR will do, and why it is needed.
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