I got the same error when I changed the condition to "1"

I am receiving the error on the Operation.

I literally just want to sort by filename so for example I will get files with different ward names in so I want to route them relating to this.

If I remove the router so its a direct service to operation for all files it works.  its only when I add in this router that I get the error on the operation.

Thanks

Lorraine

When I do this I get the error and the pdf file is written but corrupt in my file drop location.

Any ideas why? or what I am doing wrong. I have it set up as shown above.