Unable to save a 1D mesh made of polylines

Dear everybody,
I’m trying to save a MEDCouplingUMesh object, with mesh dimension equal to 1 and made of only NORM_POLYL cells, but I cannot do to the following error message:

 Cell #0 has a type NORM_POLYL not in input array of type !

I’ve tried versions 9.7 (compiled with spack), 9.10 and 9.11 (from dowloaded linux platform) obtaining always the same message.
The attached file is a simple example used to obtain the error message. If mc.NORM_SEG2 is used instead of mc.NORM_POLYL then no error message is obtained

Thank you for the support,

1d_mesh.py (335 Bytes)