diff --git a/src/components/sequencing/SequenceEditor.svelte b/src/components/sequencing/SequenceEditor.svelte
index 065509d109..2965095f1d 100644
--- a/src/components/sequencing/SequenceEditor.svelte
+++ b/src/components/sequencing/SequenceEditor.svelte
@@ -265,10 +265,19 @@
     const sequence = viewUpdate.state.doc.toString();
     disableCopyAndExport = sequence === '';
     const tree = syntaxTree(viewUpdate.state);
-    const output = await selectedOutputFormat?.toOutputFormat?.(tree, sequence, commandDictionary, sequenceName);
+    let output = await selectedOutputFormat?.toOutputFormat?.(tree, sequence, commandDictionary, sequenceName);
 
     if ($sequenceAdaptation?.modifyOutput !== undefined && output !== undefined) {
-      $sequenceAdaptation?.modifyOutput(output, parameterDictionaries, channelDictionary);
+      const modifiedOutput = $sequenceAdaptation.modifyOutput(output, parameterDictionaries, channelDictionary);
+      if (modifiedOutput === null) {
+        output = 'modifyOutput returned null. Verify your adaptation is correct';
+      } else if (modifiedOutput === undefined) {
+        output = 'modifyOutput returned undefined. Verify your adaptation is correct';
+      } else if (typeof modifiedOutput === 'object') {
+        output = JSON.stringify(modifiedOutput);
+      } else {
+        output = `${modifiedOutput}`;
+      }
     }
 
     editorOutputView.dispatch({ changes: { from: 0, insert: output, to: editorOutputView.state.doc.length } });
diff --git a/src/utilities/sequence-editor/extension-points.ts b/src/utilities/sequence-editor/extension-points.ts
index 225bca51a8..8d238f41d8 100644
--- a/src/utilities/sequence-editor/extension-points.ts
+++ b/src/utilities/sequence-editor/extension-points.ts
@@ -54,15 +54,22 @@ export async function toInputFormat(
   channelDictionary: ChannelDictionary | null,
 ) {
   const modifyOutputParse = get(sequenceAdaptation).modifyOutputParse;
-  let modifiedOutput = null;
-
   if (modifyOutputParse !== undefined) {
-    modifiedOutput = await modifyOutputParse(output, parameterDictionaries, channelDictionary);
-  }
-
-  const input = await get(inputFormat)?.toInputFormat?.(modifiedOutput ?? output);
+    let modifiedOutput = await modifyOutputParse(output, parameterDictionaries, channelDictionary);
+    if (modifiedOutput === null) {
+      modifiedOutput = 'modifyOutputParse returned null. Verify your adaptation is correct';
+    } else if (modifiedOutput === undefined) {
+      modifiedOutput = 'modifyOutputParse returned undefined. Verify your adaptation is correct';
+    } else if (typeof modifiedOutput === 'object') {
+      modifiedOutput = JSON.stringify(modifiedOutput);
+    } else {
+      modifiedOutput = `${modifiedOutput}`;
+    }
 
-  return input;
+    return await get(inputFormat)?.toInputFormat?.(modifiedOutput);
+  } else {
+    return await get(inputFormat)?.toInputFormat?.(output);
+  }
 }
 
 export function inputLinter(