diff --git a/Makefile b/Makefile
index 648a9a4faf08055f530502ec075055d0d695a577..f7c4a7a592edf8ca806ea181c988b89a52a1dff5 100644
--- a/Makefile
+++ b/Makefile
@@ -38,8 +38,9 @@ CPPFLAGS= $(INCLUDE)   -g -fsanitize=address -mllvm -asan-stack
 CPPFLAGS= $(INCLUDE)    
 LIB = -L$(CFITSIOLIB) -lcfitsio -lm
 
+all:	GaiaGsrParSim
 
-all: GaiaGsrPar MemReq GaiaGsrParSim GaiaFits2Bin GaiaBin2Fits GaiaBin2Reduced GaiaCkEmptyCols GaiaBin2Asc   GaiaChTask GaiaRepTask
+####all: GaiaGsrPar MemReq GaiaGsrParSim GaiaFits2Bin GaiaBin2Fits GaiaBin2Reduced GaiaCkEmptyCols GaiaBin2Asc   GaiaChTask GaiaRepTask
 ###all: GaiaGsrPar MemReq GaiaGsrParTest GaiaFits2Bin GaiaBin2Fits GaiaBin2Reduced 
 
 ckemptycols.o: ckemptycols.cpp