diff --git a/ICAFIX/ReApplyFixMultiRunPipeline.sh b/ICAFIX/ReApplyFixMultiRunPipeline.sh
index 7515bd0e2..302968156 100755
--- a/ICAFIX/ReApplyFixMultiRunPipeline.sh
+++ b/ICAFIX/ReApplyFixMultiRunPipeline.sh
@@ -366,6 +366,12 @@ show_tool_versions()
 	fsl_version_get fsl_ver
 	log_Msg "FSL version: ${fsl_ver}"
 
+	# Show specific FIX version, if available
+	if [ -f ${FSL_FIXDIR}/fixversion ]; then
+		fixversion=$(cat ${FSL_FIXDIR}/fixversion )
+		log_Msg "FIX version: $fixversion"
+	fi
+
 	old_or_new_version=$(determine_old_or_new_fsl ${fsl_ver})
 	if [ "${old_or_new_version}" == "OLD" ] ; then
 		log_Err_Abort "FSL version 6.0.1 or greater is required."
@@ -415,9 +421,6 @@ main()
 		local this_script_dir=$(dirname "$0")
 	fi
 
-	# Show tool versions
-	show_tool_versions
-
 	log_Msg "Starting main functionality"
 
 	# Retrieve positional parameters
@@ -530,6 +533,9 @@ main()
 	# It is for that reason that the code below needs to use separate calls to fix_3_clean, with and without DoVol
 	# as an argument, rather than simply passing in the value of DoVol as set within this script.
 	# Not sure if/when this non-intuitive behavior of fix_3_clean will change, but this is accurate as of fix1.067
+	# UPDATE (11/8/2019): As of FIX 1.06.12, fix_3_clean interprets its 5th argument ("DoVol") in the usual boolean
+	# manner. However, since we already had a work-around to this problem, we will leave the code unchanged so that
+	# we don't need to add a FIX version dependency to the script.
 
 	log_Msg "Use fixlist=$fixlist"
 	
@@ -1105,6 +1111,9 @@ log_Check_Env_Var CARET7DIR
 log_Check_Env_Var FSLDIR
 log_Check_Env_Var FSL_FIXDIR
 
+# Show tool versions
+show_tool_versions
+
 # Determine whether named or positional parameters are used and invoke 'main' function
 if [[ ${1} == --* ]]; then
 	# Named parameters (e.g. --parameter-name=parameter-value) are used
diff --git a/ICAFIX/ReApplyFixPipeline.sh b/ICAFIX/ReApplyFixPipeline.sh
index 9dadece8e..04121bf57 100755
--- a/ICAFIX/ReApplyFixPipeline.sh
+++ b/ICAFIX/ReApplyFixPipeline.sh
@@ -268,6 +268,13 @@ show_tool_versions()
 	log_Msg "Showing FSL version"
 	fsl_version_get fsl_ver
 	log_Msg "FSL version: ${fsl_ver}"
+
+	# Show specific FIX version, if available
+	if [ -f ${FSL_FIXDIR}/fixversion ]; then
+		fixversion=$(cat ${FSL_FIXDIR}/fixversion )
+		log_Msg "FIX version: $fixversion"
+	fi
+
 }
 
 # ------------------------------------------------------------------------------
@@ -423,6 +430,9 @@ main()
 	# It is for that reason that the code below needs to use separate calls to fix_3_clean, with and without DoVol
 	# as an argument, rather than simply passing in the value of DoVol as set within this script.
 	# Not sure if/when this non-intuitive behavior of fix_3_clean will change, but this is accurate as of fix1.067
+	# UPDATE (11/8/2019): As of FIX 1.06.12, fix_3_clean interprets its 5th argument ("DoVol") in the usual boolean
+	# manner. However, since we already had a work-around to this problem, we will leave the code unchanged so that
+	# we don't need to add a FIX version dependency to the script.
 
 	log_Msg "Use fixlist=$fixlist"
 
diff --git a/ICAFIX/hcp_fix b/ICAFIX/hcp_fix
index 8b33c3f6f..dcf47b0b0 100755
--- a/ICAFIX/hcp_fix
+++ b/ICAFIX/hcp_fix
@@ -69,6 +69,76 @@ fi
 
 #############################################################
 
+### Support Functions
+
+# Function to return whether FIX version is "NEW" (i.e., 1.06.12 or later).
+# Need at least that fix version for proper handling of the
+# do_motion_regression=FALSE condition (when highpass>=0)
+
+# NOTE:
+#   Don't echo anything in this function other than the last echo
+#   that outputs the return value
+#
+determine_old_or_new_fix()
+{
+	# Default to "OLD", and change to "NEW" only if version is 1.06.12 or later
+	local old_or_new="OLD"
+	
+	fix_version_file="${FSL_FIXDIR}/fixversion"
+
+	if [ -f "${fix_version_file}" ]; then
+		
+		fix_version=$(cat "${fix_version_file}")
+
+		# parse the FIX version information into primary, secondary, and tertiary parts
+		fix_version_array=(${fix_version//./ })
+		
+		fix_primary_version="${fix_version_array[0]}"
+		fix_primary_version=${fix_primary_version//[!0-9]/}
+	
+		fix_secondary_version="${fix_version_array[1]}"
+		fix_secondary_version=${fix_secondary_version//[!0-9]/}
+	
+		fix_tertiary_version="${fix_version_array[2]}"
+		fix_tertiary_version=${fix_tertiary_version//[!0-9]/}
+
+		# Important: Use single bracket for following tests, since double bracket results in interpretation
+		# of a leading zero as an octal number.
+		# [Alternatively, could force a base-10 interpretation using a "$(( 10#$ver ))" construction].
+		if [ ${fix_primary_version} -ge 2 ] ; then
+			old_or_new="NEW"
+		elif [ ${fix_primary_version} -eq 1 ] ; then
+			if [ ${fix_secondary_version} -ge 7 ] ; then
+				old_or_new="NEW"
+			elif [ ${fix_secondary_version} -eq 6 ] ; then
+				if [ ${fix_tertiary_version} -ge 12 ] ; then
+					old_or_new="NEW"
+				fi
+			fi
+		fi
+
+	fi
+
+	echo ${old_or_new}
+}
+
+function interpret_as_bool()
+{
+    case $(echo "$1" | tr '[:upper:]' '[:lower:]') in
+    (true | yes | 1)
+        echo TRUE
+        ;;
+    (false | no | none | 0)
+        echo FALSE
+        ;;
+    (*)
+        log_Err_Abort "error: '$1' is not valid for this argument, please use TRUE or FALSE"
+        ;;
+    esac
+}
+
+#############################################################
+
 # Set global variables
 g_script_name=$(basename "${0}")
 
@@ -106,11 +176,21 @@ log_Msg "Showing FSL version"
 fsl_version_get fsl_ver
 log_Msg "FSL version: ${fsl_ver}"
 
+# Show specific FIX version, if available
+if [ -f ${FSL_FIXDIR}/fixversion ]; then
+	fixversion=$(cat ${FSL_FIXDIR}/fixversion )
+	log_Msg "FIX version: $fixversion"
+fi
+
 # Log FSL_FIX_MATLAB_MODE (from the settings.sh file)
 log_Msg "FSL_FIX_MATLAB_MODE: ${FSL_FIX_MATLAB_MODE}"
 
 #############################################################
 
+## ---------------------------------------------------------------------------
+## Parse and check parameters
+## ---------------------------------------------------------------------------
+
 fmri=$1
 cd `dirname $fmri`
 fmri=`basename $fmri`  # After this, $fmri no longer includes the leading directory components
@@ -121,28 +201,18 @@ fi
 
 hp=$2
 
-function interpret_as_bool()
-{
-    case $(echo "$1" | tr '[:upper:]' '[:lower:]') in
-    (true | yes | 1)
-        echo TRUE
-        ;;
-    (false | no | none | 0)
-        echo FALSE
-        ;;
-    (*)
-        log_Err_Abort "error: '$1' is not valid for this argument, please use TRUE or FALSE"
-        ;;
-    esac
-}
-
 doMotionRegression=$(interpret_as_bool "$3")
-# 5/20/2019: For the time being, do_motion_regression=FALSE doesn't work properly with single-run FIX,
-# so don't allow that mode of operation
+# do_motion_regression=FALSE combined with hp filtering doesn't work properly with single-run FIX,
+# for fix versions earlier than 1.06.12, so don't allow that mode of operation if the fix version
+# isn't recent enough.
 # https://github.com/Washington-University/HCPpipelines/issues/108
+# Check and abort early if we can't implement the requested options with the fix version in use.
 if [[ "$doMotionRegression" == "FALSE" ]]
 then
-    log_Err_Abort "Due to a restriction in the FIX argument parsing, do_motion_regression=$3 is not currently supported"
+	old_or_new_fix=$(determine_old_or_new_fix)
+	if [ "${old_or_new_fix}" == "OLD" ] && (( hp >= 0 )) ; then
+		log_Err_Abort "Due to a restriction in the FIX argument parsing, do_motion_regression=$3 is not supported for FIX versions prior to 1.06.12"
+	fi
 fi
 
 unset TrainingData
@@ -160,13 +230,23 @@ if [ -z "${FixThresh}" ]; then
 	FixThresh=10
 fi
 
+## ---------------------------------------------------------------------------
+## Report parameters
+## ---------------------------------------------------------------------------
+
+log_Msg "fMRI Name: ${fmri}"
+log_Msg "highpass: ${hp}"
+log_Msg "doMotionRegression: ${doMotionRegression}"
+log_Msg "TrainingData: ${TrainingData}"
+log_Msg "FixThresh: ${FixThresh}"
+log_Msg "DeleteIntermediates: ${DeleteIntermediates}"
+
 ## ---------------------------------------------------------------------------
 ## Preparation (highpass)
 ## ---------------------------------------------------------------------------
 
 tr=`$FSLDIR/bin/fslval $fmri pixdim4`
 log_Msg "tr: ${tr}"
-log_Msg "processing FMRI file ${fmri} with highpass ${hp}"
 
 fmrihp=${fmri}_hp${hp}
 if (( hp > 0 )); then
@@ -337,12 +417,24 @@ fi
 log_Msg "using training data file: ${TrainingData}"
 
 # set up fix command
+# use array for whitespace safety, even if the rest of the script isn't
 if [[ ${doMotionRegression} == "TRUE" ]]; then
-    #use array for whitespace safety, even if the rest of the script isn't
     fix_cmd=("${FSL_FIXDIR}/fix" "${fmrihp}.ica" "${TrainingData}" "${FixThresh}" -m -h "${hp}")
 else
-    #-h is actually a subargument to -m, and will cause problems if specified without (or even not directly following) -m
-    fix_cmd=("${FSL_FIXDIR}/fix" "${fmrihp}.ica" "${TrainingData}" "${FixThresh}")
+	old_or_new_fix=$(determine_old_or_new_fix)
+	if [[ "${old_or_new_fix}" == "NEW" ]]; then
+		# In the "NEW" (1.06.12 or later) version of FIX, -h is no longer a subargument to -m, and can occur by itself
+		fix_cmd=("${FSL_FIXDIR}/fix" "${fmrihp}.ica" "${TrainingData}" "${FixThresh}" -h "${hp}")
+
+	elif (( hp < 0 )); then
+		# Ok to proceed regardless of FIX version, since not filtering, so we don't need the filtering of the CIFTI
+		# that occurs in fix_3_clean. Simply don't supply either the -m or -h flags.
+		fix_cmd=("${FSL_FIXDIR}/fix" "${fmrihp}.ica" "${TrainingData}" "${FixThresh}")
+
+	else  # "OLD" and (hp >= 0)
+		# Already aborted in this case earlier, but include again here for completeness
+		log_Err_Abort "Due to a restriction in the FIX argument parsing, do_motion_regression=$3 is not supported for FIX versions prior to 1.06.12"
+	fi
 fi
 log_Msg "fix_cmd: ${fix_cmd[*]}"
 ## MPH: The 'fix' script itself will continue to log to its own custom files
diff --git a/ICAFIX/hcp_fix_multi_run b/ICAFIX/hcp_fix_multi_run
index af65d866d..d1d371156 100755
--- a/ICAFIX/hcp_fix_multi_run
+++ b/ICAFIX/hcp_fix_multi_run
@@ -140,6 +140,12 @@ log_Msg "Showing FSL version"
 fsl_version_get fsl_ver
 log_Msg "FSL version: ${fsl_ver}"
 
+# Show specific FIX version, if available
+if [ -f ${FSL_FIXDIR}/fixversion ]; then
+	fixversion=$(cat ${FSL_FIXDIR}/fixversion )
+	log_Msg "FIX version: $fixversion"
+fi
+
 # Log FSL_FIX_MATLAB_MODE (from the settings.sh file)
 log_Msg "FSL_FIX_MATLAB_MODE: ${FSL_FIX_MATLAB_MODE}"
 
@@ -150,7 +156,8 @@ FSL_FIX_WBC=${Caret7_Command}  # Used by fix_3_clean in interpreted matlab/octav
 	
 #############################################################
 
-#
+### Support Functions
+
 # NOTE:
 #   Don't echo anything in this function other than the last echo
 #   that outputs the return value
@@ -241,18 +248,40 @@ demeanMovementRegressors() {
 	echo "${AllOut}" > ${Out}
 }
 
-fsl_version_get fsl_ver
-log_Msg "FSL version: ${fsl_ver}"
+function interpret_as_bool()
+{
+    case $(echo "$1" | tr '[:upper:]' '[:lower:]') in
+    (true | yes | 1)
+        echo TRUE
+        ;;
+    (false | no | none | 0)
+        echo FALSE
+        ;;
+    (*)
+        log_Err_Abort "error: '$1' is not valid for this argument, please use TRUE or FALSE"
+        ;;
+    esac
+}
 
-old_or_new_version=$(determine_old_or_new_fsl ${fsl_ver})
+#############################################################
 
+## ---------------------------------------------------------------------------
+## Check whether FSL version is recent enough
+## ---------------------------------------------------------------------------
+
+old_or_new_version=$(determine_old_or_new_fsl ${fsl_ver})
 if [ "${old_or_new_version}" == "OLD" ] ; then
 	log_Err_Abort "FSL version 6.0.1 or greater is required."
 fi
 
+## ---------------------------------------------------------------------------
+## Parse and check parameters
+## ---------------------------------------------------------------------------
+
+fmris=`echo ${1} | sed 's/@/ /g'` # replaces the @ that combines the filenames with ' '
+
 hp=$2
 if [[ "${hp}" == "0" ]]; then
-	log_Msg "hp=0 corresponds to a linear detrend"
 	pdFlag=TRUE
 fi
 if [[ "${hp}" == pd* ]]; then
@@ -271,27 +300,7 @@ if [[ $(echo "${hpNum} < 0" | bc) == "1" ]]; then  #Logic of this script does no
     log_Err_Abort "highpass value must not be negative"
 fi
 
-log_Msg "hp: ${hp}"
-
-fmris=`echo ${1} | sed 's/@/ /g'` # replaces the @ that combines the filenames with ' '
-log_Msg "fmris: ${fmris}"
 ConcatName="${3}"
-log_Msg "ConcatName: ${ConcatName}"
-
-function interpret_as_bool()
-{
-    case $(echo "$1" | tr '[:upper:]' '[:lower:]') in
-    (true | yes | 1)
-        echo TRUE
-        ;;
-    (false | no | none | 0)
-        echo FALSE
-        ;;
-    (*)
-        log_Err_Abort "error: '$1' is not valid for this argument, please use TRUE or FALSE"
-        ;;
-    esac
-}
 
 doMotionRegression=$(interpret_as_bool "$4")
 
@@ -310,10 +319,23 @@ if [ -z "${FixThresh}" ]; then
 	FixThresh=10
 fi
 
-DIR=`pwd`
-log_Msg "PWD : $DIR"
+## ---------------------------------------------------------------------------
+## Report parameters
+## ---------------------------------------------------------------------------
 
-#echo $fmris | tr ' ' '\n' #separates paths separated by ' '
+log_Msg "fMRI Names: ${fmris}"
+log_Msg "highpass: ${hp}"
+if [[ "${hp}" == "0" ]]; then
+	log_Msg "hp=0 corresponds to a linear detrend"
+fi
+log_Msg "ConcatName: ${ConcatName}"
+log_Msg "doMotionRegression: ${doMotionRegression}"
+log_Msg "TrainingData: ${TrainingData}"
+log_Msg "FixThresh: ${FixThresh}"
+log_Msg "DeleteIntermediates: ${DeleteIntermediates}"
+
+DIR=`pwd`
+log_Msg "PWD: $DIR"
 
 ## ---------------------------------------------------------------------------
 ## Preparation (highpass) on the individual runs
@@ -738,11 +760,14 @@ fi
 log_Msg "using training data file: ${TrainingData}"
 
 # set up fix command
+# use array for whitespace safety, even if the rest of the script isn't
 if [[ ${doMotionRegression} == "TRUE" ]]; then
-    #use array for whitespace safety, even if the rest of the script isn't
     fix_cmd=("${FSL_FIXDIR}/fix" "${concatfmrihp}.ica" "${TrainingData}" "${FixThresh}" -m -h "${AlreadyHP}")
 else
     #-h is actually a subargument to -m, and will cause problems if specified without (or even not directly following) -m
+	# Update (11/8/2019): No longer true as of FIX 1.06.12, but since filtering of the CIFTI in MR-FIX occurs in
+	# functionhighpassandvariancenormalize it doesn't matter, so we leave the code unchanged so that we don't
+	# need to add a FIX version dependency to the script
     fix_cmd=("${FSL_FIXDIR}/fix" "${concatfmrihp}.ica" "${TrainingData}" "${FixThresh}")
 fi
 log_Msg "fix_cmd: ${fix_cmd[*]}"