diff --git a/HVCAEN/iocBoot/iocHVCAEN-IOC-01/st-common.cmd b/HVCAEN/iocBoot/iocHVCAEN-IOC-01/st-common.cmd
new file mode 100644
index 000000000..e213bcd08
--- /dev/null
+++ b/HVCAEN/iocBoot/iocHVCAEN-IOC-01/st-common.cmd
@@ -0,0 +1,64 @@
+#!../../bin/windows-x64-debug/HVCAEN-IOC-01
+
+## You may have to change HVCAEN-IOC-01 to something else
+## everywhere it appears in this file
+
+< envPaths
+
+cd ${TOP}
+
+## Register all support components
+dbLoadDatabase "dbd/HVCAEN-IOC-01.dbd"
+HVCAEN_IOC_01_registerRecordDeviceDriver pdbbase
+
+##ISIS## Run IOC initialisation 
+< $(IOCSTARTUP)/init.cmd
+
+$(IFREADONLY= ) epicsEnvSet CAN_WRITE "#"
+
+# use -D argument to turn on debugging
+
+stringiftest("IP0Present", "$(HVCAENIP0="")", 13, "")
+stringiftest("IP1Present", "$(HVCAENIP1="")", 13, "")
+stringiftest("IP2Present", "$(HVCAENIP2="")", 13, "")
+stringiftest("IP3Present", "$(HVCAENIP3="")", 13, "")
+stringiftest("IP4Present", "$(HVCAENIP4="")", 13, "")
+stringiftest("IP5Present", "$(HVCAENIP5="")", 13, "")
+stringiftest("IP6Present", "$(HVCAENIP6="")", 13, "")
+stringiftest("IP7Present", "$(HVCAENIP7="")", 13, "")
+
+
+## arguments to CAENx527ConfigureCreate are: name, ip_address, username, password
+## username, password are optional and the crate factory default is used if these are not specified
+$(IFIP0Present) CAENx527ConfigureCreate "hv0!$(HVCAENSYSTYPE0=SY1527)", "$(HVCAENIP0="")"
+$(IFIP1Present) CAENx527ConfigureCreate "hv1!$(HVCAENSYSTYPE1=SY1527)", "$(HVCAENIP1="")"
+$(IFIP2Present) CAENx527ConfigureCreate "hv2!$(HVCAENSYSTYPE2=SY1527)", "$(HVCAENIP2="")"
+$(IFIP3Present) CAENx527ConfigureCreate "hv3!$(HVCAENSYSTYPE3=SY1527)", "$(HVCAENIP3="")"
+$(IFIP4Present) CAENx527ConfigureCreate "hv4!$(HVCAENSYSTYPE4=SY1527)", "$(HVCAENIP4="")"
+$(IFIP5Present) CAENx527ConfigureCreate "hv5!$(HVCAENSYSTYPE5=SY1527)", "$(HVCAENIP5="")"
+$(IFIP6Present) CAENx527ConfigureCreate "hv6!$(HVCAENSYSTYPE6=SY1527)", "$(HVCAENIP6="")"
+$(IFIP7Present) CAENx527ConfigureCreate "hv7!$(HVCAENSYSTYPE7=SY1527)", "$(HVCAENIP7="")"
+
+calc("NCHANSUMMCHAR","$(NCHANSUMM=200)*40", 1, 2)
+
+##ISIS## Load common DB records 
+< $(IOCSTARTUP)/dbload.cmd
+
+## Load our record instances
+#dbLoadRecords("db/xxx.db","user=faa59Host")
+$(CAN_WRITE= ) CAENx527DbLoadRecords("P=$(MYPVPREFIX)CAEN, ALARM_WHEN_ON=$(ALARM_WHEN_ON=NO_ALARM), ALARM_WHEN_RAMPING=$(ALARM_WHEN_RAMPING=NO_ALARM), ASG=READONLY, NCHANSUMM=$(NCHANSUMM=200), NCHANSUMMCHAR=$(NCHANSUMMCHAR)")
+$(IFREADONLY= ) CAENx527DbLoadRecords("P=$(MYPVPREFIX)CAEN, ALARM_WHEN_ON=$(ALARM_WHEN_ON=NO_ALARM), ALARM_WHEN_RAMPING=$(ALARM_WHEN_RAMPING=NO_ALARM), ASG=DEFAULT, NCHANSUMM=$(NCHANSUMM=200), NCHANSUMMCHAR=$(NCHANSUMMCHAR)")
+
+##ISIS## Stuff that needs to be done after all records are loaded but before iocInit is called 
+< $(IOCSTARTUP)/preiocinit.cmd
+
+cd ${TOP}/iocBoot/${IOC}
+iocInit
+
+## Start any sequence programs
+#seq sncxxx,"user=faa59Host"
+
+##ISIS## Stuff that needs to be done after iocInit is called e.g. sequence programs 
+< $(IOCSTARTUP)/postiocinit.cmd
+
+seq sncSummary, "P=$(MYPVPREFIX)CAEN"
diff --git a/HVCAEN/iocBoot/iocHVCAEN-IOC-01/st.cmd b/HVCAEN/iocBoot/iocHVCAEN-IOC-01/st.cmd
index c690480b8..5afdc337d 100644
--- a/HVCAEN/iocBoot/iocHVCAEN-IOC-01/st.cmd
+++ b/HVCAEN/iocBoot/iocHVCAEN-IOC-01/st.cmd
@@ -11,55 +11,6 @@ cd ${TOP}
 dbLoadDatabase "dbd/HVCAEN-IOC-01.dbd"
 HVCAEN_IOC_01_registerRecordDeviceDriver pdbbase
 
-##ISIS## Run IOC initialisation 
-< $(IOCSTARTUP)/init.cmd
+## calling common command file in ioc 01 boot dir
+< ${TOP}/iocBoot/iocHVCAEN-IOC-01/st-common.cmd
 
-$(IFREADONLY= ) epicsEnvSet CAN_WRITE "#"
-
-# use -D argument to turn on debugging
-
-stringiftest("IP0Present", "$(HVCAENIP0="")", 13, "")
-stringiftest("IP1Present", "$(HVCAENIP1="")", 13, "")
-stringiftest("IP2Present", "$(HVCAENIP2="")", 13, "")
-stringiftest("IP3Present", "$(HVCAENIP3="")", 13, "")
-stringiftest("IP4Present", "$(HVCAENIP4="")", 13, "")
-stringiftest("IP5Present", "$(HVCAENIP5="")", 13, "")
-stringiftest("IP6Present", "$(HVCAENIP6="")", 13, "")
-stringiftest("IP7Present", "$(HVCAENIP7="")", 13, "")
-
-
-## arguments to CAENx527ConfigureCreate are: name, ip_address, username, password
-## username, password are optional and the crate factory default is used if these are not specified
-$(IFIP0Present) CAENx527ConfigureCreate "hv0!$(HVCAENSYSTYPE0=SY1527)", "$(HVCAENIP0="")"
-$(IFIP1Present) CAENx527ConfigureCreate "hv1!$(HVCAENSYSTYPE1=SY1527)", "$(HVCAENIP1="")"
-$(IFIP2Present) CAENx527ConfigureCreate "hv2!$(HVCAENSYSTYPE2=SY1527)", "$(HVCAENIP2="")"
-$(IFIP3Present) CAENx527ConfigureCreate "hv3!$(HVCAENSYSTYPE3=SY1527)", "$(HVCAENIP3="")"
-$(IFIP4Present) CAENx527ConfigureCreate "hv4!$(HVCAENSYSTYPE4=SY1527)", "$(HVCAENIP4="")"
-$(IFIP5Present) CAENx527ConfigureCreate "hv5!$(HVCAENSYSTYPE5=SY1527)", "$(HVCAENIP5="")"
-$(IFIP6Present) CAENx527ConfigureCreate "hv6!$(HVCAENSYSTYPE6=SY1527)", "$(HVCAENIP6="")"
-$(IFIP7Present) CAENx527ConfigureCreate "hv7!$(HVCAENSYSTYPE7=SY1527)", "$(HVCAENIP7="")"
-
-
-calc("NCHANSUMMCHAR","$(NCHANSUMM=200)*40", 1, 2)
-
-##ISIS## Load common DB records 
-< $(IOCSTARTUP)/dbload.cmd
-
-## Load our record instances
-#dbLoadRecords("db/xxx.db","user=faa59Host")
-$(CAN_WRITE= ) CAENx527DbLoadRecords("P=$(MYPVPREFIX)CAEN, ALARM_WHEN_ON=$(ALARM_WHEN_ON=NO_ALARM), ALARM_WHEN_RAMPING=$(ALARM_WHEN_RAMPING=NO_ALARM), ASG=READONLY, NCHANSUMM=$(NCHANSUMM=200), NCHANSUMMCHAR=$(NCHANSUMMCHAR)")
-$(IFREADONLY= ) CAENx527DbLoadRecords("P=$(MYPVPREFIX)CAEN, ALARM_WHEN_ON=$(ALARM_WHEN_ON=NO_ALARM), ALARM_WHEN_RAMPING=$(ALARM_WHEN_RAMPING=NO_ALARM), ASG=DEFAULT, NCHANSUMM=$(NCHANSUMM=200), NCHANSUMMCHAR=$(NCHANSUMMCHAR)")
-
-##ISIS## Stuff that needs to be done after all records are loaded but before iocInit is called 
-< $(IOCSTARTUP)/preiocinit.cmd
-
-cd ${TOP}/iocBoot/${IOC}
-iocInit
-
-## Start any sequence programs
-#seq sncxxx,"user=faa59Host"
-
-##ISIS## Stuff that needs to be done after iocInit is called e.g. sequence programs 
-< $(IOCSTARTUP)/postiocinit.cmd
-
-seq sncSummary, "P=$(MYPVPREFIX)CAEN"
diff --git a/HVCAEN/iocBoot/iocHVCAENSIM-IOC-01/st.cmd b/HVCAEN/iocBoot/iocHVCAENSIM-IOC-01/st.cmd
index cdd94bdae..3c3ea4255 100644
--- a/HVCAEN/iocBoot/iocHVCAENSIM-IOC-01/st.cmd
+++ b/HVCAEN/iocBoot/iocHVCAENSIM-IOC-01/st.cmd
@@ -11,39 +11,5 @@ cd ${TOP}
 dbLoadDatabase "dbd/HVCAENSIM-IOC-01.dbd"
 HVCAENSIM_IOC_01_registerRecordDeviceDriver pdbbase
 
-calc("NCHANSUMMCHAR","$(NCHANSUMM=200)*40", 1, 2)
-
-##ISIS## Run IOC initialisation 
-< $(IOCSTARTUP)/init.cmd
-
-$(IFREADONLY= ) epicsEnvSet CAN_WRITE "#"
-
-# use -D argument to turn on debugging
-
-## arguments to CAENx527ConfigureCreate are: name, ip_address, username, password
-## username, password are optional and the crate factory default is used if these are not specified
-## we are in simulatiomn mode, so IP address is ignored
-CAENx527ConfigureCreate "hv0", "127.0.0.1"
-#CAENx527ConfigureCreate "hv1", "halldcaenhv1"
-
-##ISIS## Load common DB records 
-< $(IOCSTARTUP)/dbload.cmd
-
-## Load our record instances
-#dbLoadRecords("db/xxx.db","user=faa59Host")
-$(CAN_WRITE= ) CAENx527DbLoadRecords("P=$(MYPVPREFIX)CAEN, ALARM_WHEN_ON=$(ALARM_WHEN_ON=NO_ALARM), ALARM_WHEN_RAMPING=$(ALARM_WHEN_RAMPING=NO_ALARM), ASG=READONLY, NCHANSUMM=$(NCHANSUMM=200), NCHANSUMMCHAR=$(NCHANSUMMCHAR)")
-$(IFREADONLY= ) CAENx527DbLoadRecords("P=$(MYPVPREFIX)CAEN, ALARM_WHEN_ON=$(ALARM_WHEN_ON=NO_ALARM), ALARM_WHEN_RAMPING=$(ALARM_WHEN_RAMPING=NO_ALARM), ASG=DEFAULT, NCHANSUMM=$(NCHANSUMM=200), NCHANSUMMCHAR=$(NCHANSUMMCHAR)")
-
-##ISIS## Stuff that needs to be done after all records are loaded but before iocInit is called 
-< $(IOCSTARTUP)/preiocinit.cmd
-
-cd ${TOP}/iocBoot/${IOC}
-iocInit
-
-## Start any sequence programs
-#seq sncxxx,"user=faa59Host"
-
-##ISIS## Stuff that needs to be done after iocInit is called e.g. sequence programs 
-< $(IOCSTARTUP)/postiocinit.cmd
-
-seq sncSummary, "P=$(MYPVPREFIX)CAEN"
+## calling common command file in ioc 01 boot dir
+< ${TOP}/iocBoot/iocHVCAEN-IOC-01/st-common.cmd