Installing cereb-nest module in NEST 2.18.1

[AliceGem]

Hi guys,

I created a new branch to install cereb-nest in the current NEST 2.18 branch (which should be 2.18.1 version) - commit 4971497.
The make and install work with no errors, but when running nest.Install("cerebmodule") in PyNEST I get:

python3: symbol lookup error: /home/mizzou/nest-simulator/b/lib/nest/cerebmodule.so: undefined symbol: _ZN4nest25register_connection_modelIN6mynest19STDPAlphaConnectionEEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEENS_28RegisterConnectionModelFlagsE

Any ideas on the cause of the problem? Otherwise I ask to nest people!

[alberto-antonietti]

This error seems to involve only the STDP Alpha connection, did you update it to v2.18.1? This should also affect the other STDP rules.

[AliceGem]

The STDPApha connection source code no..I am going to check..yes, in general this affects all the STDP new connection models..other workaround: https://github.com/nest/nest-simulator/tree/nest-2.18 downloading from here we get the last 2.18 right?? No way to get the 2.18 version that we installed in our PCs?

[alberto-antonietti]

Also from here: https://zenodo.org/record/2605422/files/nest-simulator-2.18.0.tar.gz

[AliceGem]

Top!

[AliceGem]

We will solve this after moving to a new NEST release!

[alberto-antonietti]

Also, NEST 3 is on its way... and it will change a lot of stuff :-|

[AliceGem]

Exactly..let's make big changes from our side only after the official release.

[Helveg]

Let's be day one adopters of NEST 3 ;p

[AliceGem]

With NEST 2.20 - reported from @a1eko:

[ 6%] Building CXX object CMakeFiles/cerebmodule_module.dir/cerebmodule.cpp.o
/home/akozlov/prog/eglif/cereb-nest/cerebmodule.cpp: In member function 'virtual void mynest::CerebModule::init(SLIInterpreter*)':
/home/akozlov/prog/eglif/cereb-nest/cerebmodule.cpp:139:60: error: no matching function for call to 'nest::ModelManager::register_connection_model<mynest::STDPAlphaConnectionnest::TargetIdentifierPtrRport >(const char [19])'
139 | TargetIdentifierPtrRport > >( "stdp_synapse_alpha" );
|

                                                   ^

[Helveg]

So they probably changed the extension module interface in 2.20; You could look up the MyModule example code for a commit in 2.20, that should tell you the new correct way to register connection models.