Dear Lea,

Indeed, from this NEST version on, re-sorting of internal connection structures may invalidate the descriptor tuples that GetConnections() returns, see https://github.com/nest/nest-simulator/issues/1224.

If I understand correctly what the developers say at the link above, one should place all their Connect() calls before all their GetConnections() calls. So, you may safely ignore that warning if at the moment it appears you do not have any connection descriptors stored to be then passed to GetStatus() or SetStatus().

Yours,

Alex Serenko,

student at Kurchatov Institute, Moscow, Russia

Четверг, 20 февраля 2020, 15:57 +03:00 от Lea Steffen <steffen@fzi.de>:
Hi everybody,

I switched from Nest 2.16 to 2.20 and now I get this warning message:

ConnectionManager [Warning]:
New connections created, connection descriptors previously obtained using
'GetConnections' are now invalid

This happens at several parts in my code while building synapses with 'sim.Projection(...)'. I use a 'FromListConnector' and 'STDPMechanism' as synapse_type.

I neversaw this warning in the previous Nest version, is it something to be concerned about?

I am not quite sure what it is trying to tell me.

Thanks in advance, Lea
.........................................................
M. Sc. Lea Steffen
Wissenschaftlicher Mitarbeiter | Research Scientist
Intelligent Systems and Production Engineering (ISPE)
Interactive Diagnosis and Service Systems (IDS)

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