Network Mining extension in Knime (Nightly)

KNIME Analytics Platform
1

Hi, I installed Knime 4.0.0 nb 2019.06.07 and the Network Mining extension.
Trying to open a wf with inside an Object Inserter Node I got the following error message:
Best,
Alfredo

*** Welcome to KNIME Analytics Platform v4.0.0.v201906071349 ***
*** Copyright by KNIME AG, Zurich, Switzerland ***

Log file is located at: C:\Applicazioni\Knime.metadata\knime\knime.log
ERROR Object Inserter 0:225 Problems during initialization of basic feature type (for extension ‘org.knime.network.core.core.feature.FeatureTypeSDF’.)
WARN Network Viewer 0:226 Network needs to be directed

2

Hi @alfroc

thank you for noticing this!
I will test this. Please note this is a nightly built and should not used for productoin.

Best wishes, Iris

3

Hi @alfroc

I just tried to reprocude this, but did not manage. Can you send me more information? e.g. an example workflow which fails in the nightly?

Thank you! Iris

4

Hi Iris, here it is.
Best,
Alfredo

Customer Satisfaction - LDA.knwf (26.2 KB)

5

Updated to v4.0.0.v201906260931 .
Still doesn’t work.
Best
Alfredo

6

Hi Alfredo,
I have a hunch that this is due to a missing plugin. This shouldn’t cause any problems but it seems in your case it does.
Can you please check if you have installed the KNIME Base Chemistry Types & Nodes (see below)

image
image1238×718 26.5 KB

To check if they are installed open KNIME and go to File->install KNIME Extensions…. In the Install dialog search for chem and hit enter. You should then see a similar view like above. If they aren’t installed please install them restart KNIME and try again to open the workflow.
Thanks
Tobias

7

Hi Tobias,
the problem is not due to a missing plugin. Simply that the Network Viewer (Local) Node doesn’t work with the “Radial tree” option for the layout… Did you try the wkf I provided for testing it?
Best,
Alfredo

8

Hello Alfredo,
I didn’t know that you had a problem with the radial tree layout. The radial tree layout only works for trees e.g. directed networks that have a single root from which all other nodes can be reached. According to the warning message your network is not directed.
Bye
Tobias

1 Like
9

Hi Tobias,
yes, sorry for the misunderstanding… the strange thing is that it worked before!
Please solve.
Bye
Alfredo

10

@alfroc

do I understand you correctly. Running the very same same workflow with 3.7.2. created a different results than in 4.0?

11

Hi Mark,
yes, if you want you can try by yourself, I attached my workflow some time ago…
Best,
Alfredo

12

Hi @alfroc,

unfortunately I couldn’t reproduce your issue. For me, the workflow you attached earlier does not work in 3.7.2. Could you maybe try your workflow again in KNIME 3.7.2? If you do not have a KNIME 3.7.2 anymore you can download it here: https://www.knime.com/download-previous-versions

Cheers,
Dave

13

Hi Dave,
neither could I. I tried to change some options in the Object Inserter Node without success, the message coming from the Network Viewer Node (Radial Tree algorithm) is always the same: “Network needs to be directed”.
Fortunately, the Fruchterman-Reingold algorithm is quite similar to what I’d like to get and it works!
At this point, I close this post.
Best,
Alfredo

14

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