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4	4	(% class="wikigeneratedid" %)
5	5	For more information on the Collaboratory, please seee the [[documentation of the EBRAINS Collaboratory environment>>https://wiki.ebrains.eu/bin/view/Collabs/the-collaboratory/]].
6	6
7		-(% class="wikigeneratedid" %)
8	8	== Temporary problems ==
9	9
10		-=== August 2022: "504 Gateway Time-out" ===
	9	+Currently none known.
11	11
12		-The call to //client.list_resource_requests(repoInfo.nameInTheUrl)// in the batch-exmaple notebooks currently (19 August 2022) result in a "504 Gateway Time-out" error due to a problem in the back-end. As a workaround, please just skip the part by inserting a line with the content
13		-//break//
14		-before the
15		-//a=client.list_resource_requests(repoInfo.nameInTheUrl)//
16		-line in the example notebook.
17		-
18	18	== Jupyter notebook environment ("Lab") related ==
19	19
20	20	=== Error message "Error in Authenticator.pre_spawn_start: ... 401: Unauthorized" ===
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44	44	[[image:1623846323177-898.png||height="287" width="350"]]
45	45
46	46
	40	+=== Error message: "Could not identify EBRAINS kernel " ===
	41	+
	42	+If your notebook shows "RuntimeError: Could not identify EBRAINS kernel (probably too old version). Please select the appropriate kernel EBRAINS_experimental_release.": Please check, whether an EBRAINS kernel has been selected as kernel for the notebook execution.  In the example screenshot below the "Python 3 (ipykernel)" has been used, as shown in the upper right hand corner of the tab with the notebook.
	43	+
	44	+[[image:1666184857320-440.png]]
	45	+
	46	+
	47	+Fix: click the current kernel name to get the kernel selection dialog box and select the "EBRAINS_experimental_release" kernel (blue highlight in the screenshot shown below):
	48	+
	49	+[[image:image-20221019150927-1.png]]
	50	+
	51	+(% class="wikigeneratedid" %)
47	47	=== Import error for hbp_service_client ===
48	48
49	49	The hbp_service_client was needed for the now not-existing-any-longer Collaboratory version 1. The import line can be deleted from scripts.
50	50
51		-
52	52	== BrainScaleS-2 specific ==
53	53
54	54	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.
...	...	@@ -90,6 +90,11 @@
90	90
91	91	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.
92	92
	97	+(% class="wikigeneratedid" %)
	98	+=== Jobs for wafer 33 fail with "Slurm execution failed with state CANCELLED by 0" ===
	99	+
	100	+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.
	101	+
93	93	=== //PyMarocco.None// needs to be changed to //PyMarocco.Without (Nov 2021)// ===
94	94
95	95	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]].
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103	103
104	104	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).
105	105
106		-==== ====
	115	+==== ====

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