Error "Error validating ib request - please enter a local symbol or an expiry" for FX

[demarcog]

A trade request was sent from esignal to IB last night and failed due to "Error validating ib request - please enter a local symbol or an expiry"

I believe I have the symbology specified properly.

Does anyone know the correct expiry specification for symbols I cannot find any information in the forum, knowledgebase, or IB's web site. I'm not sure what this field signifies for CASH FOREX as as far as I know there is no "expiration" per se.

EUR A0-FX
GBP A0-FX
CHF A0-FX
AUD A0-FX
CAD A0-FX
EURJPY A0-FX

Thanks very much.