There are a few document exceptions which you can use. They typically catch when there is a syntax error in the XML for example. If a specific value had nothing in it, the variable should be null. You can use a simple If statement at that point.
Thanks for the reply, I used an If statement but it still doesn't work.
I'm using an "Extract XML Doc Data" step with xpath "//SSC/DNIS[ENTITY=" + Entity_ID + "]/TFN".
If there's a match it copies the result into a variable called HMO_TFN which I then pass through a number of variables using the java substring(x,x) class; but if it doesn't find a match it fails... but it fails at the first instance of the substring(x,x) though and not really after the extract xml object.
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