There are two ways you can know whether your model is corrupted:
First, a warning symbol will be displayed in front of the object name in the object list.
Second, if the model examination feature is enabled, when importing the model, Luban will automatically detect the deficient model and give a warning.
To enable the model examination feature, please go to Preferences > General > Model Examination.
It is recommended to repair the deficient model, in case it may cause print failures.
Correspondingly, there are two ways to repair the corrupeted model: