From 70171f65c94f19f7fc94eb86f39586838deb4d7a Mon Sep 17 00:00:00 2001
From: wiechula <Jens.Wiechula@cern.ch>
Date: Thu, 19 Oct 2023 11:31:09 +0200
Subject: [PATCH] only throw if there is data, but not all received

---
 Modules/TPC/src/Utility.cxx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Modules/TPC/src/Utility.cxx b/Modules/TPC/src/Utility.cxx
index fccbc1736e..13a77a7c1b 100644
--- a/Modules/TPC/src/Utility.cxx
+++ b/Modules/TPC/src/Utility.cxx
@@ -108,6 +108,7 @@ std::unique_ptr<o2::tpc::internal::getWorkflowTPCInput_ret> clusterHandler(o2::f
   }
 
   unsigned long recvMask = 0;
+  bool hasData = false;
   for (auto const& ref : o2::framework::InputRecordWalker(inputs, filter)) {
     auto const* sectorHeader = o2::framework::DataRefUtils::getHeader<o2::tpc::TPCSectorHeader*>(ref);
     if (sectorHeader == nullptr) {
@@ -122,8 +123,9 @@ std::unique_ptr<o2::tpc::internal::getWorkflowTPCInput_ret> clusterHandler(o2::f
     }
     recvMask |= (sectorHeader->sectorBits & tpcSectorMask);
     retVal->internal.inputrefs[sector].data = ref;
+    hasData = true;
   }
-  if (recvMask != tpcSectorMask) {
+  if (hasData && (recvMask != tpcSectorMask)) {
     throw std::runtime_error("Incomplete set of clusters/digits received");
   }