calculateDescendingConnectivity() error

Hi,

I get the following error while reading a MED file:

RuntimeError: Salome Exception in /local/palmco/SALOME2/MED/V3_2_9/MED_SRC/src/MEDMEM/MEDMEM_Connectivity.cxx [1485] : CONNECTIVITY::calculateDescendingConnectivity() : More than one other Cell (2)

I have identified this to a mesh group of 1-D edges in a 3-D mesh. If I do not create a group on this, I do not get this error.

Could anyone help me with some hint about why this is happening? I would greatly appreciate that.

Regards,
Manav