Twinmotion Official Community Group | Hi, I often have issues with TM importing material from Sketchup | Facebook
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Open lumion 11 file to lumion 10|Migrate to a newer version of Lumion|Save lumion file in low format – Architect Muhyuddin
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How do you resolve the message "Error while importing model - exitCode 0xc0000409" – Lumion - User Support
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