[PyMOL] loading multiple structures from one file

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Hello, list.

When loading a mol2 file (or an SDF file) with multiple structures in
it, I see only one structure displayed, although the following lines
are printed in the external GUI window.

 ObjectMolReadMOL2Str: read molecule 1
 ObjectMolReadMOL2Str: read molecule 2
 ObjectMolReadMOL2Str: read molecule 3
 ObjectMolReadMOL2Str: read molecule 4
...............

How can I display all the molecules ?
Thanks a lot.