Hey Robin, Using Devices in NEST is currently under reconstruction. Mainly, we are thinking of not considering the devices to be part of the network, but rather an extension of the neuron that will be attached dynamically at runtime. So basically the problem of knowing if the device is a receiver or sender (i.e, being on the left or side of the Connect call) won't be an issue anymore, as devices won't be connected at all! Best, Ayssar ------------------------------ *From:* Robin Gilbert De Schepper <robingilbert.deschepper(a)unipv.it> *Sent:* Wednesday, May 17, 2023 4:20:31 PM *To:* NEST User Mailing List *Subject:* [NEST Users] Handle input/output relation of device to node connection Hello NEST users, I'm trying to connect some devices in a black box manner and run into this error: ``` nest.lib.hl_api_exceptions.NESTErrors.IllegalConnection: IllegalConnection in SLI function Connect_g_g_D_D: Creation of connection is not possible because: Source node does not send output. Note that recorders must be connected as Connect(neuron, recorder). ``` Is there a way for me to inspect whether I should nest.Connect(A, B) or nest.Connect(B, A), or should I catch this error and try the inverse? Is this the only `IllegalConnection` error that can be thrown, or should I parse the error message? (which is prone to changes) -- Robin De Schepper, MSc (they/them) Department of Brain and Behavioral Sciences Unit of Neurophysiology University of Pavia, Italy Via Forlanini 6, 27100 Pavia - Italy Tel: (+39) 038298-7607 http://www-5.unipv.it/dangelo/ ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------ Forschungszentrum Juelich GmbH 52425 Juelich Sitz der Gesellschaft: Juelich Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498 Vorsitzender des Aufsichtsrats: MinDir Stefan Müller Geschaeftsfuehrung: Prof. Dr.-Ing. Wolfgang Marquardt (Vorsitzender), Karsten Beneke (stellv. Vorsitzender), Dr. Ir. Pieter Jansens, Prof. Dr. Astrid Lambrecht, Prof. Dr. Frauke Melchior ------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------ _______________________________________________ NEST Users mailing list -- users(a)nest-simulator.org To unsubscribe send an email to users-leave(a)nest-simulator.org