This looks like a defect. All active currencies should work with IPA.
You can try for instance EURGTQ.
we support the following list of Fx Instruments:
Thank you - my question is more detailed though. Sorry if this was not clear - the client would like an explicit list of currencies they can cross with this API. For example GTQ= is a currency we cover on Elektron, but it cannot be used, it seems, as a cross-rate using this API, e.g. GTQUSD or USDGTQ. Do we have an explicit list of all the cross currencies that are available?