Configure failed (NullPointerException): null

Node Development
1

Good morning,

I have a problem when i connect my node with the filereader node , an error message is showed "

ERROR  main Node  Configure failed (NullPointerException): null "

I did functional tests on some dialog component to display error messages (for example the text field must not end with one;) and I put in return: return new DataTableSpec [] {null}; But if I connect my node with the node filereader a null configure message is displayed but the execution works well

Can you tell me what i write in the return ?

Thanks

 

2

You need to return your output table specification(s) which you will be making somewhere if you ececute method works.

3

can you tell me how to return the output table spec in configure method

Thanks

4

https://tech.knime.org/developer-guide