java.lang.NullPointerException

**sebastianengelmann** · August 24, 2018, 6:16am

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

**Marten_Pfannenschmidt** · August 27, 2018, 12:03pm

Hi Sebastian,

Can you share the workflow with us?

Cheers,
Marten

**sebastianengelmann** · August 27, 2018, 1:29pm

Hello Marten,

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

Best regards
Sebastian

**navinjadhav** · October 9, 2019, 11:04am

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.

**navinjadhav** · October 9, 2019, 11:06am

**Marten_Pfannenschmidt** · October 9, 2019, 2:23pm

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?

Best,
Marten

**navinjadhav** · October 10, 2019, 6:00am

server 4.9

as of now i installed new AP and its working