The FIX adapter does not use the com.apama.marketdata.DepthSubscriptionError or com.apama.marketdata.TickSubscriptionError events to notify clients of a problem with the data stream. Instead, a com.apama.marketdata.Depth and/or com.apama.marketdata.Tick is issued with _ERROR and _FAULT set in the extra parameters.

You can use "_ERROR" to get the error message (corresponds to DepthSubscriptionError.status or TickSubscriptionError.status).

"_FAULT" indicates the status of the subscription (corresponds to DepthSubscriptionError.fault or TickSubscriptionError.fault).

Using Depth and Tick events instead of DepthSubscriptionError/TickSubscriptionError allows multiple subscriptions to the same symbol (with differing extra parameters) to be maintained.