diff --git a/kotlin-fit-performer/src/main/kotlin/com/couchbase/client/performer/kotlin/KotlinSdkCommandExecutor.kt b/kotlin-fit-performer/src/main/kotlin/com/couchbase/client/performer/kotlin/KotlinSdkCommandExecutor.kt
index 511cbc7d5..ed9de00a9 100644
--- a/kotlin-fit-performer/src/main/kotlin/com/couchbase/client/performer/kotlin/KotlinSdkCommandExecutor.kt
+++ b/kotlin-fit-performer/src/main/kotlin/com/couchbase/client/performer/kotlin/KotlinSdkCommandExecutor.kt
@@ -292,9 +292,9 @@ class KotlinSdkCommandExecutor(
                         perRun,
                         request.streamConfig.streamId,
                         request.streamConfig,
-                    ) { documentOrId ->
-                        processScanResult(request, documentOrId)
-                    }
+                        { documentOrId -> processScanResult(request, documentOrId) },
+                        { throwable -> convertException(throwable) }
+                    )
 
                 perRun.streamerOwner().addAndStart(streamer)
                 result.setStream(
diff --git a/kotlin-fit-performer/src/main/kotlin/com/couchbase/stream/FluxStreamer.java b/kotlin-fit-performer/src/main/kotlin/com/couchbase/stream/FluxStreamer.java
index 1f5ac37d5..842f247ff 100644
--- a/kotlin-fit-performer/src/main/kotlin/com/couchbase/stream/FluxStreamer.java
+++ b/kotlin-fit-performer/src/main/kotlin/com/couchbase/stream/FluxStreamer.java
@@ -21,8 +21,13 @@ public class FluxStreamer<T> extends Streamer<T> {
   private final Flux<T> results;
   private final AtomicReference<BaseSubscriber> subscriberRef = new AtomicReference<>();
 
-  public FluxStreamer(Flux<T> results, PerRun perRun, String streamId, Config streamConfig, Function<T, Result> convert) {
-    super(perRun, streamId, streamConfig, convert);
+  public FluxStreamer(Flux<T> results,
+                      PerRun perRun,
+                      String streamId,
+                      Config streamConfig,
+                      Function<T, Result> convertResult,
+                      Function<Throwable, com.couchbase.client.protocol.shared.Exception> convertException) {
+    super(perRun, streamId, streamConfig, convertResult, convertException);
     this.results = results;
   }
 
@@ -35,7 +40,7 @@ public boolean isCreated() {
   public void run() {
     AtomicBoolean done = new AtomicBoolean(false);
 
-    BaseSubscriber<T> subscriber = new BaseSubscriber<T>() {
+    BaseSubscriber subscriber = new BaseSubscriber<T>() {
       @Override
       protected void hookOnSubscribe(Subscription subscription) {
         if (streamConfig.hasAutomatically()) {
@@ -49,7 +54,7 @@ protected void hookOnSubscribe(Subscription subscription) {
       protected void hookOnNext(T value) {
         logger.info("Flux streamer {} sending one", streamId);
 
-        perRun.resultsStream().enqueue(convert.apply(value));
+        perRun.resultsStream().enqueue(convertResult.apply(value));
         streamed.incrementAndGet();
       }
 
@@ -79,8 +84,9 @@ protected void hookOnError(Throwable throwable) {
 
         perRun.resultsStream().enqueue(Result.newBuilder()
           .setStream(com.couchbase.client.protocol.streams.Signal.newBuilder()
-            // todo convert error
-            .setError(com.couchbase.client.protocol.streams.Error.newBuilder().setStreamId(streamId)))
+            .setError(com.couchbase.client.protocol.streams.Error.newBuilder()
+              .setException(convertException.apply(throwable))
+              .setStreamId(streamId)))
           .build());
       }