"KNIME://" protocol doesn't support output


I am trying to write a file writer that is supposed to conform to the KNIME standards. Thus, I thought I would allow for the knime protocol, i.e. URLs.

Unfortunately I get the following error message:

ERROR     KNIME-Worker-0 FQCWriter     Execute failed: protocol doesn't support output

I am using the following URL:


Is this a coding problem on my side or a feature on the KNIME side?


Thanks for the clarification.





Writing to URLs is not supported in general, because most URLs (e.g. jar, http, ...) are read-only. For the knime-protocol we may also add write support but this hasn't been implemented yet.