Yes, I do mean copy the file into a folder in a directory in the project.
However, I tried in a new project, without any nc file in it. And found that all nc file will show in Labfloor. That to say the err does not exist.
Then, what confused me to think there is a err, is the sorting of name in the Labfloor. As shown in the attachment figure, the au-*.nc is inside the b**.nc.
in the past, them should be listed by name. and if we copy a new nc file into the project folder, or click to chose a nc file, this file will listed in the bottom of Labfloor.
it is convenience for me to find a nc file in Labfloor.
However, now, I am exactly do not know where to find my nc file from a lot of files.