I have a workflow that should be extracting the data from a variable, but I am getting an error every now and then.
Ex: fn-Trim(varDescription).
Error retrieving context data. Error executing inline (fn-Trim) function. Check that the correct arguments have been passed to the function.
This help page on Inline functions suggests "If text used for a function argument contains function syntax (i.e. a brace or comma character) wrap the argument with {TextStart} and {TextEnd} to indicate a block of text that should not be parsed further." It's solved several Inline function issues for me in the past.
Thanks Jeff! This fixed an inline function issue that was driving me nuts for ages! 
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