diff --git a/core/qa/CbmQaCanvas.h b/core/qa/CbmQaCanvas.h index d88209aa46c6daa2588a8700512b98171b4d5d06..d24d08a3b3ae681892d847d2b3c8626363f95dcf 100644 --- a/core/qa/CbmQaCanvas.h +++ b/core/qa/CbmQaCanvas.h @@ -48,6 +48,10 @@ private: /// Constructor which calls TCanvas constructor and restores the bach mode template<typename... Types> CbmQaCanvas(MyBoolean oldBatchMode, Types... args) : TCanvas(args...) { + // prevent automatic deletion of this canvas + // when another canvas with the same name is created somewhere else + gROOT->GetListOfCanvases()->Remove(this); + // reset the batch mode to its original value gROOT->SetBatch((Bool_t) oldBatchMode); }