diff --git a/src/collect.rs b/src/collect.rs
index b444f7b..b392041 100644
--- a/src/collect.rs
+++ b/src/collect.rs
@@ -21,12 +21,13 @@ use std::task::Context;
 use std::task::Poll;
 use std::time::Instant;
 
-#[derive(Debug, thiserror::Error)]
-#[cstm(name = "CollectDyn")]
-pub enum Error {
-    Msg(String),
-    NoResultNoCollector,
-}
+autoerr::create_error_v1!(
+    name(Error, "CollectDyn"),
+    enum variants {
+        Msg(String),
+        NoResultNoCollector,
+    },
+);
 
 struct ErrMsg<E>(E)
 where
@@ -46,6 +47,7 @@ pub enum CollectResult<T>
 where
     T: fmt::Debug,
 {
+    Empty,
     Timeout,
     Some(T),
 }
@@ -203,7 +205,7 @@ where
                     }
                     None => {
                         debug!("no result because no collector was created");
-                        Ready(Ok(CollectResult::Timeout))
+                        Ready(Ok(CollectResult::Empty))
                     }
                 }
             } else {
diff --git a/src/plaineventsjson.rs b/src/plaineventsjson.rs
index 0750002..b028ed5 100644
--- a/src/plaineventsjson.rs
+++ b/src/plaineventsjson.rs
@@ -22,13 +22,14 @@ use serde_json::Value as JsonValue;
 use std::time::Duration;
 use std::time::Instant;
 
-#[derive(Debug, thiserror::Error)]
-#[cstm(name = "PlainEventsJson")]
-pub enum Error {
-    Stream(#[from] crate::plaineventsstream::Error),
-    Json(#[from] serde_json::Error),
-    Collect(#[from] crate::collect::Error),
-}
+autoerr::create_error_v1!(
+    name(Error, "PlainEventsJson"),
+    enum variants {
+        Stream(#[from] crate::plaineventsstream::Error),
+        Json(#[from] serde_json::Error),
+        Collect(#[from] crate::collect::Error),
+    },
+);
 
 pub async fn plain_events_json(
     evq: &PlainEventsQuery,
@@ -57,15 +58,22 @@ pub async fn plain_events_json(
     )
     .await?;
     warn!("plain_events_json  collected  {:?}", collected);
-    if let CollectResult::Some(x) = collected {
-        let x = x.into_user_facing_api_type_box();
-        let val = x.into_serializable_json();
-        let jsval = serde_json::to_string(&val)?;
-        debug!("plain_events_json  json serialized");
-        Ok(CollectResult::Some(JsonBytes::new(jsval)))
-    } else {
-        debug!("plain_events_json  timeout");
-        Ok(CollectResult::Timeout)
+    match collected {
+        CollectResult::Some(x) => {
+            let x = x.into_user_facing_api_type_box();
+            let val = x.into_serializable_json();
+            let jsval = serde_json::to_string(&val)?;
+            debug!("plain_events_json  json serialized");
+            Ok(CollectResult::Some(JsonBytes::new(jsval)))
+        }
+        CollectResult::Empty => {
+            debug!("plain_events_json  empty");
+            Ok(CollectResult::Empty)
+        }
+        CollectResult::Timeout => {
+            debug!("plain_events_json  timeout");
+            Ok(CollectResult::Timeout)
+        }
     }
 }
 
diff --git a/src/timebinnedjson.rs b/src/timebinnedjson.rs
index ef10846..73a7449 100644
--- a/src/timebinnedjson.rs
+++ b/src/timebinnedjson.rs
@@ -342,12 +342,12 @@ pub async fn timebinned_json(
     let collected: BoxFuture<_> = Box::pin(collected);
     let collres = collected.await?;
     match collres {
-        CollectResult::Some(collres) => {
-            let x = collres.into_user_facing_api_type_box();
-            let val = x.into_serializable_json();
+        CollectResult::Some(res) => {
+            let val = res.into_user_facing_api_type_box().into_serializable_json();
             let jsval = serde_json::to_string(&val)?;
             Ok(CollectResult::Some(JsonBytes::new(jsval)))
         }
+        CollectResult::Empty => Ok(CollectResult::Empty),
         CollectResult::Timeout => Ok(CollectResult::Timeout),
     }
 }