diff --git a/doc/fix_ave_correlate.html b/doc/fix_ave_correlate.html
index 76e1c2edde..eda6a0785b 100644
--- a/doc/fix_ave_correlate.html
+++ b/doc/fix_ave_correlate.html
@@ -37,7 +37,7 @@
 </PRE>
 <LI>zero or more keyword/arg pairs may be appended 
 
-<LI>keyword = <I>type</I> or <I>ave</I> or <I>start</I> or <I>prefactor</I> or <I>file</I> or <I>title1</I> or <I>title2</I> or <I>title3</I> 
+<LI>keyword = <I>type</I> or <I>ave</I> or <I>start</I> or <I>prefactor</I> or <I>file</I> or <I>overwrite</I> or <I>title1</I> or <I>title2</I> or <I>title3</I> 
 
 <PRE>  <I>type</I> arg = <I>auto</I> or <I>upper</I> or <I>lower</I> or <I>auto/upper</I> or <I>auto/lower</I> or <I>full</I>
     auto = correlate each value with itself
@@ -55,6 +55,7 @@
     value = prefactor to scale all the correlation data by
   <I>file</I> arg = filename
     filename = name of file to output correlation data to
+  <I>overwrite</I> arg = none = overwrite output file with only latest output
   <I>title1</I> arg = string
     string = text to print as 1st line of output file
   <I>title2</I> arg = string
@@ -245,6 +246,10 @@ number of rows is <I>Nrepeat</I>, as described above.  The number of
 columns is the Npair+2, also as described above.  Thus the file ends
 up to be a series of these array sections.
 </P>
+<P>The <I>overwrite</I> keyword will continuously overwrite the output file
+with the latest output, so that it only contains one timestep worth of
+output.  This option can only be used with the <I>ave running</I> setting.
+</P>
 <P>The <I>title1</I> and <I>title2</I> and <I>title3</I> keywords allow specification of
 the strings that will be printed as the first 3 lines of the output
 file, assuming the <I>file</I> keyword was used.  LAMMPS uses default
diff --git a/doc/fix_ave_correlate.txt b/doc/fix_ave_correlate.txt
index cf792ee112..47036af03f 100644
--- a/doc/fix_ave_correlate.txt
+++ b/doc/fix_ave_correlate.txt
@@ -26,7 +26,7 @@ value = c_ID, c_ID\[N\], f_ID, f_ID\[N\], v_name :l
   v_name = global value calculated by an equal-style variable with name :pre
 
 zero or more keyword/arg pairs may be appended :l
-keyword = {type} or {ave} or {start} or {prefactor} or {file} or {title1} or {title2} or {title3} :l
+keyword = {type} or {ave} or {start} or {prefactor} or {file} or {overwrite} or {title1} or {title2} or {title3} :l
   {type} arg = {auto} or {upper} or {lower} or {auto/upper} or {auto/lower} or {full}
     auto = correlate each value with itself
     upper = correlate each value with each succeeding value
@@ -43,6 +43,7 @@ keyword = {type} or {ave} or {start} or {prefactor} or {file} or {title1} or {ti
     value = prefactor to scale all the correlation data by
   {file} arg = filename
     filename = name of file to output correlation data to
+  {overwrite} arg = none = overwrite output file with only latest output
   {title1} arg = string
     string = text to print as 1st line of output file
   {title2} arg = string
@@ -232,6 +233,10 @@ number of rows is {Nrepeat}, as described above.  The number of
 columns is the Npair+2, also as described above.  Thus the file ends
 up to be a series of these array sections.
 
+The {overwrite} keyword will continuously overwrite the output file
+with the latest output, so that it only contains one timestep worth of
+output.  This option can only be used with the {ave running} setting.
+
 The {title1} and {title2} and {title3} keywords allow specification of
 the strings that will be printed as the first 3 lines of the output
 file, assuming the {file} keyword was used.  LAMMPS uses default
diff --git a/doc/fix_ave_histo.html b/doc/fix_ave_histo.html
index ee99ee5236..64a299a4e5 100644
--- a/doc/fix_ave_histo.html
+++ b/doc/fix_ave_histo.html
@@ -42,7 +42,7 @@
 </PRE>
 <LI>zero or more keyword/arg pairs may be appended 
 
-<LI>keyword = <I>mode</I> or <I>file</I> or <I>ave</I> or <I>start</I> or <I>beyond</I> or <I>title1</I> or <I>title2</I> or <I>title3</I> 
+<LI>keyword = <I>mode</I> or <I>file</I> or <I>ave</I> or <I>start</I> or <I>beyond</I> or <I>overwrite</I> or <I>title1</I> or <I>title2</I> or <I>title3</I> 
 
 <PRE>  <I>mode</I> arg = <I>scalar</I> or <I>vector</I>
     scalar = all input values are scalars
@@ -59,6 +59,7 @@
     ignore = ignore values outside histogram lo/hi bounds
     end = count values outside histogram lo/hi bounds in end bins
     extra = create 2 extra bins for value outside histogram lo/hi bounds
+  <I>overwrite</I> arg = none = overwrite output file with only latest output
   <I>title1</I> arg = string
     string = text to print as 1st line of output file
   <I>title2</I> arg = string
@@ -266,6 +267,10 @@ normalized count is the bin count divided by the total count (not
 including values not histogrammed), so that the normalized values sum
 to 1.0 across all bins.
 </P>
+<P>The <I>overwrite</I> keyword will continuously overwrite the output file
+with the latest output, so that it only contains one timestep worth of
+output.  This option can only be used with the <I>ave running</I> setting.
+</P>
 <P>The <I>title1</I> and <I>title2</I> and <I>title3</I> keywords allow specification of
 the strings that will be printed as the first 3 lines of the output
 file, assuming the <I>file</I> keyword was used.  LAMMPS uses default
diff --git a/doc/fix_ave_histo.txt b/doc/fix_ave_histo.txt
index 7f009eba04..1d7a1d6163 100644
--- a/doc/fix_ave_histo.txt
+++ b/doc/fix_ave_histo.txt
@@ -29,7 +29,7 @@ value = x, y, z, vx, vy, vz, fx, fy, fz, c_ID, c_ID\[N\], f_ID, f_ID\[N\], v_nam
   v_name = value(s) calculated by an equal-style or atom-style variable with name :pre
 
 zero or more keyword/arg pairs may be appended :l
-keyword = {mode} or {file} or {ave} or {start} or {beyond} or {title1} or {title2} or {title3} :l
+keyword = {mode} or {file} or {ave} or {start} or {beyond} or {overwrite} or {title1} or {title2} or {title3} :l
   {mode} arg = {scalar} or {vector}
     scalar = all input values are scalars
     vector = all input values are vectors
@@ -45,6 +45,7 @@ keyword = {mode} or {file} or {ave} or {start} or {beyond} or {title1} or {title
     ignore = ignore values outside histogram lo/hi bounds
     end = count values outside histogram lo/hi bounds in end bins
     extra = create 2 extra bins for value outside histogram lo/hi bounds
+  {overwrite} arg = none = overwrite output file with only latest output
   {title1} arg = string
     string = text to print as 1st line of output file
   {title2} arg = string
@@ -251,6 +252,10 @@ normalized count is the bin count divided by the total count (not
 including values not histogrammed), so that the normalized values sum
 to 1.0 across all bins.
 
+The {overwrite} keyword will continuously overwrite the output file
+with the latest output, so that it only contains one timestep worth of
+output.  This option can only be used with the {ave running} setting.
+
 The {title1} and {title2} and {title3} keywords allow specification of
 the strings that will be printed as the first 3 lines of the output
 file, assuming the {file} keyword was used.  LAMMPS uses default
diff --git a/doc/fix_ave_spatial.html b/doc/fix_ave_spatial.html
index 82b446bd34..477afc51c2 100644
--- a/doc/fix_ave_spatial.html
+++ b/doc/fix_ave_spatial.html
@@ -45,7 +45,7 @@
 </PRE>
 <LI>zero or more keyword/arg pairs may be appended 
 
-<LI>keyword = <I>norm</I> or <I>units</I> or <I>file</I> or <I>ave</I> or <I>title1</I> or <I>title2</I> or <I>title3</I> 
+<LI>keyword = <I>norm</I> or <I>units</I> or <I>file</I> or <I>ave</I> or <I>overwrite</I> or <I>title1</I> or <I>title2</I> or <I>title3</I> 
 
 <PRE>  <I>units</I> arg = <I>box</I> or <I>lattice</I> or <I>reduced</I>
   <I>norm</I> arg = <I>all</I> or <I>sample</I>
@@ -57,6 +57,7 @@
     window M = output average of M most recent Nfreq steps
   <I>file</I> arg = filename
     filename = file to write results to
+  <I>overwrite</I> arg = none = overwrite output file with only latest output
   <I>title1</I> arg = string
     string = text to print as 1st line of output file
   <I>title2</I> arg = string
@@ -293,6 +294,10 @@ quantities.  If the value of the <I>units</I> keyword is <I>box</I> or
 <I>units</I> keyword is <I>reduced</I>, the "coord" is printed in reduced units
 (0-1).
 </P>
+<P>The <I>overwrite</I> keyword will continuously overwrite the output file
+with the latest output, so that it only contains one timestep worth of
+output.  This option can only be used with the <I>ave running</I> setting.
+</P>
 <P>The <I>title1</I> and <I>title2</I> and <I>title3</I> keywords allow specification of
 the strings that will be printed as the first 3 lines of the output
 file, assuming the <I>file</I> keyword was used.  LAMMPS uses default
diff --git a/doc/fix_ave_spatial.txt b/doc/fix_ave_spatial.txt
index a9e6f16d1d..3c251c4a04 100644
--- a/doc/fix_ave_spatial.txt
+++ b/doc/fix_ave_spatial.txt
@@ -32,7 +32,7 @@ value = vx, vy, vz, fx, fy, fz, density/mass, density/number, c_ID, c_ID\[I\], f
   v_name = per-atom vector calculated by an atom-style variable with name :pre
 
 zero or more keyword/arg pairs may be appended :l
-keyword = {norm} or {units} or {file} or {ave} or {title1} or {title2} or {title3} :l
+keyword = {norm} or {units} or {file} or {ave} or {overwrite} or {title1} or {title2} or {title3} :l
   {units} arg = {box} or {lattice} or {reduced}
   {norm} arg = {all} or {sample}
   {region} arg = region-ID
@@ -43,6 +43,7 @@ keyword = {norm} or {units} or {file} or {ave} or {title1} or {title2} or {title
     window M = output average of M most recent Nfreq steps
   {file} arg = filename
     filename = file to write results to
+  {overwrite} arg = none = overwrite output file with only latest output
   {title1} arg = string
     string = text to print as 1st line of output file
   {title2} arg = string
@@ -278,6 +279,10 @@ quantities.  If the value of the {units} keyword is {box} or
 {units} keyword is {reduced}, the "coord" is printed in reduced units
 (0-1).
 
+The {overwrite} keyword will continuously overwrite the output file
+with the latest output, so that it only contains one timestep worth of
+output.  This option can only be used with the {ave running} setting.
+
 The {title1} and {title2} and {title3} keywords allow specification of
 the strings that will be printed as the first 3 lines of the output
 file, assuming the {file} keyword was used.  LAMMPS uses default
diff --git a/doc/fix_ave_time.html b/doc/fix_ave_time.html
index 78446a1d45..6efbe7a275 100644
--- a/doc/fix_ave_time.html
+++ b/doc/fix_ave_time.html
@@ -37,7 +37,7 @@
 </PRE>
 <LI>zero or more keyword/arg pairs may be appended 
 
-<LI>keyword = <I>mode</I> or <I>file</I> or <I>ave</I> or <I>start</I> or <I>off</I> or <I>title1</I> or <I>title2</I> or <I>title3</I> 
+<LI>keyword = <I>mode</I> or <I>file</I> or <I>ave</I> or <I>start</I> or <I>off</I> or <I>overwrite</I> or <I>title1</I> or <I>title2</I> or <I>title3</I> 
 
 <PRE>  <I>mode</I> arg = <I>scalar</I> or <I>vector</I>
     scalar = all input values are global scalars
@@ -52,6 +52,7 @@
     M = value # from 1 to Nvalues
   <I>file</I> arg = filename
     filename = name of file to output time averages to
+  <I>overwrite</I> arg = none = overwrite output file with only latest output
   <I>title1</I> arg = string
     string = text to print as 1st line of output file
   <I>title2</I> arg = string
@@ -248,6 +249,10 @@ rows is the length of the input vectors, and the number of columns is
 the number of values.  Thus the file ends up to be a series of these
 array sections.
 </P>
+<P>The <I>overwrite</I> keyword will continuously overwrite the output file
+with the latest output, so that it only contains one timestep worth of
+output.  This option can only be used with the <I>ave running</I> setting.
+</P>
 <P>The <I>title1</I> and <I>title2</I> and <I>title3</I> keywords allow specification of
 the strings that will be printed as the first 2 or 3 lines of the
 output file, assuming the <I>file</I> keyword was used.  LAMMPS uses
diff --git a/doc/fix_ave_time.txt b/doc/fix_ave_time.txt
index 18a224a7e4..31572f4a82 100644
--- a/doc/fix_ave_time.txt
+++ b/doc/fix_ave_time.txt
@@ -26,7 +26,7 @@ value = c_ID, c_ID\[N\], f_ID, f_ID\[N\], v_name :l
   v_name = global value calculated by an equal-style variable with name :pre
 
 zero or more keyword/arg pairs may be appended :l
-keyword = {mode} or {file} or {ave} or {start} or {off} or {title1} or {title2} or {title3} :l
+keyword = {mode} or {file} or {ave} or {start} or {off} or {overwrite} or {title1} or {title2} or {title3} :l
   {mode} arg = {scalar} or {vector}
     scalar = all input values are global scalars
     vector = all input values are global vectors or global arrays
@@ -40,6 +40,7 @@ keyword = {mode} or {file} or {ave} or {start} or {off} or {title1} or {title2}
     M = value # from 1 to Nvalues
   {file} arg = filename
     filename = name of file to output time averages to
+  {overwrite} arg = none = overwrite output file with only latest output
   {title1} arg = string
     string = text to print as 1st line of output file
   {title2} arg = string
@@ -235,6 +236,10 @@ rows is the length of the input vectors, and the number of columns is
 the number of values.  Thus the file ends up to be a series of these
 array sections.
 
+The {overwrite} keyword will continuously overwrite the output file
+with the latest output, so that it only contains one timestep worth of
+output.  This option can only be used with the {ave running} setting.
+
 The {title1} and {title2} and {title3} keywords allow specification of
 the strings that will be printed as the first 2 or 3 lines of the
 output file, assuming the {file} keyword was used.  LAMMPS uses