Hi all, I've been looking at using ${...} variables wherever I can and so far it's been relatively successful. The only place where I am stuck is using some comparisons, e.g. if ("%{Attribute}" == "${variable}") { ... } The Attribute portion expands, the $-variable part does not (although it is in double-quotes as per the unlang documentation). Quoting the literal value of the variable works. Am I correct in saying that this is not supported? Just asking so I know how far I can push this :-) Stefan Paetow Software Engineer +44 1235 778812 Diamond Light Source Ltd. Diamond House, Harwell Science and Innovation Campus Didcot, Oxfordshire, OX11 0DE -- This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail. Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd. Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message. Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom