From e8ab6420f944591c48b23ec623471f20e7c97da3 Mon Sep 17 00:00:00 2001
From: MRiganSUSX <M.Rigan@sussex.ac.uk>
Date: Thu, 12 Dec 2024 19:54:50 +0100
Subject: [PATCH] check for sink value

---
 src/TPRequestHandler.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/TPRequestHandler.cpp b/src/TPRequestHandler.cpp
index 191f2441..fcb844c3 100644
--- a/src/TPRequestHandler.cpp
+++ b/src/TPRequestHandler.cpp
@@ -39,6 +39,9 @@ TPRequestHandler::start(const nlohmann::json& args) {
 
 void
 TPRequestHandler::periodic_data_transmission() {
+   
+   if (m_tpset_sink == nullptr) return;
+
    dunedaq::dfmessages::DataRequest dr;
 
    {