diff --git a/packages/hydrojudge/package.json b/packages/hydrojudge/package.json
index a161f8edf..4e083c433 100644
--- a/packages/hydrojudge/package.json
+++ b/packages/hydrojudge/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "3.1.24",
+    "version": "3.1.25",
     "main": "package.json",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",
diff --git a/packages/hydrojudge/src/error.ts b/packages/hydrojudge/src/error.ts
index 1f1385749..4902914dc 100644
--- a/packages/hydrojudge/src/error.ts
+++ b/packages/hydrojudge/src/error.ts
@@ -33,14 +33,6 @@ export class FormatError extends Error {
     }
 }
 
-export class RuntimeError extends Error {
-    type = 'RuntimeError';
-
-    constructor(public detail: string, message: string) {
-        super(message);
-    }
-}
-
 export class SystemError extends Error {
     type = 'SystemError';
 
diff --git a/packages/hydrojudge/src/sandbox.ts b/packages/hydrojudge/src/sandbox.ts
index e86f19095..d59c4c3c9 100644
--- a/packages/hydrojudge/src/sandbox.ts
+++ b/packages/hydrojudge/src/sandbox.ts
@@ -126,6 +126,10 @@ async function adaptResult(result: SandboxResult, params: Parameter): Promise<Sa
     ret.files = result.files || {};
     ret.fileIds = result.fileIds || {};
     if (ret.fileIds[outname]) ret.fileIds.stdout = ret.fileIds[outname];
+    if (params.filename && !ret.fileIds[outname] && !ret.files[outname]) {
+        result.error = 'Output file not found';
+        ret.status = STATUS.STATUS_RUNTIME_ERROR;
+    }
     ret.stdout = ret.files[outname] || '';
     ret.stderr = ret.files.stderr || result.error || '';
     if (result.error) ret.error = result.error;