Problem with String to URI node - getting String column not set message

[bradley_peter]

I was using the node OK and now it seems to have stopped. I get a ‘String column not set’ message. THe input node is a List Files/Folders node which had not changed. Using vr 4.42.

Anyone got any ideas if this is a bug or something I am not configuring?

Thanks Peter

[bruno29a]

Hi @bradley_peter and welcome to the Knime Community.

The String to URI node, as the name suggests, converts a string to URI. The List Files/Folders generates results of type Path and not string. So linking String to URI node directly to List Files/Folders, it is normal you are getting that message as it cannot find any column of type String.

In this case, you want to use Path to URI node:

Path to URI

Or if you really still want to use the String to URI node, you have to convert the Path column to String first, using the Path to String node:

Path to String