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11	11	== Jupyter notebook environment ("Lab") related ==
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	13	+=== Error message "RuntimeError: EBRAINS kernel mismatch. Expected: EBRAINS-24.04 Actual: EBRAINS-25.02. Please select the appropriate kernel." ===
	14	+
	15	+The BrainScaleS notebooks intended to be used with one of the "stable release" kernels in the EBRAINS Jupyter environment check for a specific kernel version (e.g. for EBRAINS-24.04). When a newer docker image is deployed on the EBRAINS application servers (like e.g. on 14 May 2025) several old kernels are not available in that new environment (e.g. due to incompatibilities with a newer Jupyter version). Then the BrainScaleS notebooks from the stable release branch in git can not run.
	16	+
	17	+Options to fix this:
	18	+
	19	+* use the notebooks from the "experimental" release branch of the BrainScaleS notebooks. These notebooks check for the "experimental" kernel name. They are also usually the recommended-for-use-of-BrainSclaeS one, as we frequently add features and fix problems for BrainScaleS.
	20	+To get the newest version of the experimental release ones use this git clone command in the Terminal (can be started via File > New > Terminal inside the Lab):
	21	+//git clone https:~/~/github.com/electronicvisions/brainscales2-demos.git ~-~-branch jupyter-notebooks//
	22	+
	23	+* or get a fresh copy of the stable release BrainScaleS notebooks from the git repository by using (this does only help after the repository has been updated after a change of the docker image):
	24	+//git clone https:~/~/github.com/electronicvisions/brainscales2-demos.git ~-~-branch jupyter-notebooks-experimental//
	25	+
	26	+* or change the name, the notebooks test for by hand (note: if there is an incompatible change in a kernel just changing the expected kernel name will of course not help. It will then only create an error further down in the execution).
	27	+** in the directory, where the notebook is stored, find the _static/common sub-directory
	28	+** in that open the file collab_helpers.py and change the check (around line 19)
	29	+
13	13	=== Error message "Error in Authenticator.pre_spawn_start: ... 401: Unauthorized" ===
14	14
15	15	When a new user accesses the Lab in a new collab for the first time, it is possible, that the JuypterLab is not starting and instead shows a "...401 Unauthorized" message.
...	...	@@ -48,7 +48,6 @@
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49	49	[[image:image-20221019150927-1.png]]
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51		-(% class="wikigeneratedid" %)
52	52	=== Import error for hbp_service_client ===
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54	54	The hbp_service_client was needed for the now not-existing-any-longer Collaboratory version 1. The import line can be deleted from scripts.
...	...	@@ -94,6 +94,10 @@
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95	95	The [[BrainScaleS external user chat>>https://chat.bioai.eu/external-users/channels/town-square]] has service announcements (e.g. when a system is down due to maintenance) and is also a good place to ask general questions.
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	113	+=== Jobs for wafer 33 fail with "Slurm execution failed with state CANCELLED by 0" ===
	114	+
	115	+Wafer 33 is currently (August 2023) not available for use from the EBRAINS Collaboratory via the NMPI batch system. Please use wafer 30 instead.  The copy template for the example job has been updated to use wafer 30.
	116	+
97	97	=== //PyMarocco.None// needs to be changed to //PyMarocco.Without (Nov 2021)// ===
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99	99	November 2021: //marocco.backend = PyMarocco.None// had to be changed to //marocco.backend = PyMarocco.Without// due to the move to Python3, which has None as a reserved keyword. See also [[this FAQ entry in the guidebook>>https://electronicvisions.github.io/hbp-sp9-guidebook/pm/using_pm_newflow.html#rename-pymarocco-none-to-pymarocco-without]].
...	...	@@ -108,3 +108,7 @@
108	108	There are also some additional Python3 related changes in the brainscales_system_chain_test.py example. Please find a [[working example script>>https://lab.ch.ebrains.eu/user-redirect/lab/tree/shared/NMC%20Collab%20copy%20template/BrainScaleS/BrainScaleS_01_Chain.ipynb]] in our [[copy-template Drive>>https://wiki.ebrains.eu/bin/view/Collabs/nmc-collab-copy-template/Drive]] (for copying into users collabs).
109	109
110	110	==== ====
	131	+
	132	+== Spikey ==
	133	+
	134	+Support for the use of spikey via the EBRAINS RI has been removed in fall 2024. We recommend to use the much more versatile BrainScaleS-2 interactive instead.