diff --git a/rules/pulpos/default_rules.mk b/rules/pulpos/default_rules.mk
index b3e60bc..07625c4 100644
--- a/rules/pulpos/default_rules.mk
+++ b/rules/pulpos/default_rules.mk
@@ -221,9 +221,11 @@ run: $(TARGET_BUILD_DIR)/modelsim.ini  $(TARGET_BUILD_DIR)/boot $(TARGET_BUILD_D
 	$(PULPRT_HOME)/bin/stim_utils.py --binary=$(TARGETS) --vectors=$(TARGET_BUILD_DIR)/vectors/stim.txt
 
 ifdef gui
-	cd $(TARGET_BUILD_DIR) && export VSIM_RUNNER_FLAGS="+ENTRY_POINT=0x1c008080 -gLOAD_L2=JTAG -dpicpppath /usr/bin/g++ -permit_unmatched_virtual_intf -gBAUDRATE=115200" && export VOPT_ACC_ENA="YES" && vsim -64 -do 'source $(VSIM_PATH)/tcl_files/config/run_and_exit.tcl' -do 'source $(VSIM_PATH)/tcl_files/run.tcl; '
+#	cd $(TARGET_BUILD_DIR) && export VSIM_RUNNER_FLAGS="+ENTRY_POINT=0x1c008080 -gLOAD_L2=JTAG -dpicpppath /usr/bin/g++ -permit_unmatched_virtual_intf -gBAUDRATE=115200" && export VOPT_ACC_ENA="YES" && vsim -64 -do 'source $(VSIM_PATH)/tcl_files/config/run_and_exit.tcl' -do 'source $(VSIM_PATH)/tcl_files/run.tcl; '
+	cd $(TARGET_BUILD_DIR) && export VSIM_RUNNER_FLAGS="+ENTRY_POINT=0x1c008080 -gLOAD_L2=JTAG -dpicpppath /usr/bin/g++ -permit_unmatched_virtual_intf -gBAUDRATE=115200" && export VOPT_ACC_ENA="YES" && questa-2020.1 vsim -64 -do 'source $(VSIM_PATH)/tcl_files/config/run_and_exit.tcl' -do 'source $(VSIM_PATH)/tcl_files/run.tcl; '
 else
-	cd $(TARGET_BUILD_DIR) && export VSIM_RUNNER_FLAGS="+ENTRY_POINT=0x1c008080 -gLOAD_L2=JTAG -dpicpppath /usr/bin/g++ -permit_unmatched_virtual_intf -gBAUDRATE=115200" && vsim -64 -c -do 'source $(VSIM_PATH)/tcl_files/config/run_and_exit.tcl' -do 'source $(VSIM_PATH)/tcl_files/run.tcl; run_and_exit;'
+#	cd $(TARGET_BUILD_DIR) && export VSIM_RUNNER_FLAGS="+ENTRY_POINT=0x1c008080 -gLOAD_L2=JTAG -dpicpppath /usr/bin/g++ -permit_unmatched_virtual_intf -gBAUDRATE=115200" && vsim -64 -c -do 'source $(VSIM_PATH)/tcl_files/config/run_and_exit.tcl' -do 'source $(VSIM_PATH)/tcl_files/run.tcl; run_and_exit;'
+	cd $(TARGET_BUILD_DIR) && export VSIM_RUNNER_FLAGS="+ENTRY_POINT=0x1c008080 -gLOAD_L2=JTAG -dpicpppath /usr/bin/g++ -permit_unmatched_virtual_intf -gBAUDRATE=115200" && questa-2020.1 vsim -64 -c -do 'source $(VSIM_PATH)/tcl_files/config/run_and_exit.tcl' -do 'source $(VSIM_PATH)/tcl_files/run.tcl; run_and_exit;'
 endif
 
 endif