Hello everybody,

I get a java.lang.NullPointerException when I try to open an existing workflow in the KNIME Explorer.
I found out that a meta node in the workflow cause the fault. If I delete the folder of the metanode I can open the workflow. Is there a chance to restore the complete workflow without losing the metanode causing the fault?

NullPointerException.log (35.7 KB)

Many greetings

Hi Sebastian,

Can you share the workflow with us?


Hello Marten,

unfortunately that is not possible cause the data is confidential.
I wrote you an email.

Best regards

Hello Team

i am also facing the same issue,
i got notification - updates available
i installed updates from onwards
i cant connect to the server from knime AP.

Hi @navinjadhav,

this is what I got:

You updated your client KNIME AP to the latest versions (4.0.2) and now you can not connect to the server anymore. What is the server version you try to connect to (please share both version numbers, server and executor). Can you additionally share your local logs with us?


server 4.9

as of now i installed new AP and its working