I'm trying to use an XML reader to pull data from chEMBL.The API chokes on some structures that I provide to it. I have the error handling set up to pass errors out of the fail port, but the protocol still halts on some queries. The component is running inside a RTC subprotocol (which makes no difference) Here's an example URL:

https://www.ebi.ac.uk/chembl/api/data/similarity/O%5BN%5D(%3DO)c1ccccc1/100

I also tried forming the URL upstream of the reader, and having the reader use the URL from the incoming data property. Same result.