RxJava - zip list of Observable if throw exception how to get success response

Question

I am trying to call multiple API parallel using rxjava2 in Android. it's working as per the requirement but in case of any api throws exception it fails to give the response of other API's, so is there any way to call other API who returning success response.

private fun getStoreCouponData() {

    val userObservable = repo2
        .create<StoreCouponsApi>(StoreCouponsApi::class.java!!)
        .getCoupons
        .subscribeOn(Schedulers.newThread())
        .observeOn(AndroidSchedulers.mainThread())

    val eventsObservable = repo2
        .create<StoreCouponsApi>(StoreCouponsApi::class.java!!)
        .storeInfo
        .subscribeOn(Schedulers.newThread())
        .observeOn(AndroidSchedulers.mainThread())

    val combined = Observable.zip<StoreCoupons, StoreCoupons, StoreList>(userObservable, eventsObservable,
        BiFunction<StoreCoupons, StoreCoupons, StoreList> { response1, response2 -> StoreList(response1, response2) })

    combined.subscribe(object : DefaultObserver<StoreList>() {
        override fun onNext(s: StoreList) {
            for (item in s.store!!.coupons!!) {
                System.out.println(item.store)
            }
        }


        override fun onError(e: Throwable) {
           System.out.println(e)
        }

        override fun onComplete() {

        }
    })

    println(combined)

}