Hi Juanjo,
ORBX exports randomly crash Houdini for no obvious reasons.
Please find attached a test scene, as well as two logs, one where the export crashed, and the second where it worked (after reopening the scene; no changes have been done to the scene between the 2 exports).
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Windows 10
1080
Nvidia driver: 456.87
Standalone 2020.2
houdini 18.5.499
octane for Houdini 2020.2.1.2
Thanks