Concatenate Empty Tables

[mlauber71]

@barrycasey welcome to the KNIME forum.

I think you will have to use maybe a combination of case/if switches. Maybe combined with a group by and count to check for the number of rows. As it happens I collected some links about import and switches maybe that would help.

Catch file reader error and use dummy file instead

@ijoel92 You could check if a column is present and use an if switch accordingly If the data is just empty you could use the empty table switch. If you have a more complicated scenario you could take inspiration from the no 550 from this example: And then you could use a try/switch construct for if the import fails. Demonstrated here for a database scenario but could be adapted to imports.

Then the best thing would be to create a minimal viable example that represents all your challenges so the community could have a look.

Reproducible (Minimal) Workflow Example

Hi there KNIMErs! What is this topic about? This topic is about helping yourself and KNIME community! How? By creating and sharing workflow examples that help and can be successfully ran by others When? When logic requires it. For example when you are opening a topic in order to get help (you are getting error or can’t configure node and would like someone else to take a look what is wrong; or you started a workflow and got stuck so need help with next step), when you are reporting …