diff --git a/doc/xschem_man/developer_info.html b/doc/xschem_man/developer_info.html
index 28dfab55..953ab1c8 100644
--- a/doc/xschem_man/developer_info.html
+++ b/doc/xschem_man/developer_info.html
@@ -1080,9 +1080,11 @@ C {verilog_timescale.sym} 1050 -100 0 0 {name=s1 timestep="1ns" precision="1ns"
    Debug: wrapper to propagate_hilights() function </pre>
    <li><kbd>       push_undo</kbd></li><pre>
    Push current state on undo stack </pre>
-   <li><kbd>       raw what [rawfile type]</kbd></li><pre>
+   <li><kbd>       raw what [rawfile type] [sweep1 sweep2]</kbd></li><pre>
        what = read | clear | info | switch | switch_back
-   Load /clear / switch additional raw files </pre>
+   Load / clear / switch additional raw files
+   if sweep1, sweep2 interval is given in 'read' subcommand load only the interval
+   sweep1 &lt;= sweep_var &lt; sweep2 </pre>
    <li><kbd>       raw_clear </kbd></li><pre>
    Unload all simulation raw files </pre>
    <li><kbd>       raw_query loaded|value|index|values|datasets|vars|list </kbd></li><pre>
@@ -1101,10 +1103,12 @@ C {verilog_timescale.sym} 1050 -100 0 0 {name=s1 timestep="1ns" precision="1ns"
    values of 'node' for dataset 'dset' (default dset=0)
    xschem raw_query points [dset] : print simulation points for
    dataset 'dset' (default: all dataset points combined)</pre>
-   <li><kbd>       raw_read [file] [sim]</kbd></li><pre>
+   <li><kbd>       raw_read [file] [sim] [sweep1 sweep2]</kbd></li><pre>
    If a raw file is already loaded delete from memory
-   else load specified file and analysis 'sim' (dc, ac, tran, op, ...)
-   If 'sim' not specified load first section found in raw file. </pre>
+   then load specified file and analysis 'sim' (dc, ac, tran, op, ...)
+   If 'sim' not specified load first section found in raw file.
+   if sweep1, sweep2 interval is given load only the interval
+   sweep1 &lt;= sweep_var &lt; sweep2 </pre>
    <li><kbd>       raw_read_from_attr [sim]</kbd></li><pre>
    If a simulation raw file is already loaded delete from memory
    else read section 'sim' (tran, dc, ac, op, ...)
@@ -1477,6 +1481,7 @@ C {verilog_timescale.sym} 1050 -100 0 0 {name=s1 timestep="1ns" precision="1ns"
 
 
 
+
 
 
  </ul>
diff --git a/src/scheduler.c b/src/scheduler.c
index 4f9d01d3..e1e3e6b5 100644
--- a/src/scheduler.c
+++ b/src/scheduler.c
@@ -3351,17 +3351,24 @@ int xschem(ClientData clientdata, Tcl_Interp *interp, int argc, const char * arg
     else { cmd_found = 0;}
     break;
     case 'r': /*----------------------------------------------*/
-    /* raw what [rawfile type]
+    /* raw what [rawfile type] [sweep1 sweep2]
      * what = read | clear | info | switch | switch_back
-     *   Load /clear / switch additional raw files */
+     *   Load / clear / switch additional raw files
+     *   if sweep1, sweep2 interval is given in 'read' subcommand load only the interval
+     *   sweep1 <= sweep_var < sweep2 */
     if(!strcmp(argv[1], "raw"))
     {
+      double sweep1 = -1.0, sweep2 = -1.0;
       int err = 0;
       int ret = 0;
       if(!xctx) {Tcl_SetResult(interp, not_avail, TCL_STATIC); return TCL_ERROR;}
       if(argc > 3 && !strcmp(argv[2], "read")) {
-        if(argc > 4) ret = extra_rawfile(1, argv[3], argv[4], -1.0, -1.0);
-        else ret = extra_rawfile(1, argv[3], NULL, -1.0, -1.0);
+        if(argc > 6) {
+          sweep1 = atof_spice(argv[5]);
+          sweep2 = atof_spice(argv[6]);
+        }
+        if(argc > 4) ret = extra_rawfile(1, argv[3], argv[4], sweep1, sweep2);
+        else ret = extra_rawfile(1, argv[3], NULL, sweep1, sweep2);
         Tcl_SetResult(interp, my_itoa(ret), TCL_VOLATILE);
       } else if(argc > 2 && !strcmp(argv[2], "switch")) {
         if(argc > 4) {
@@ -3501,8 +3508,10 @@ int xschem(ClientData clientdata, Tcl_Interp *interp, int argc, const char * arg
 
     /* raw_read [file] [sim] [sweep1 sweep2]
      *   If a raw file is already loaded delete from memory
-     *   else load specified file and analysis 'sim' (dc, ac, tran, op, ...)
-     *   If 'sim' not specified load first section found in raw file. */
+     *   then load specified file and analysis 'sim' (dc, ac, tran, op, ...)
+     *   If 'sim' not specified load first section found in raw file.
+     *   if sweep1, sweep2 interval is given load only the interval
+     *   sweep1 <= sweep_var < sweep2 */
     else if(!strcmp(argv[1], "raw_read"))
     {
       char f[PATH_MAX + 100];
@@ -3524,8 +3533,8 @@ int xschem(ClientData clientdata, Tcl_Interp *interp, int argc, const char * arg
         tcleval(f);
         my_strncpy(f, tclresult(), S(f));
         if(argc > 5) {
-          sweep1 = atof(argv[4]);
-          sweep2 = atof(argv[5]);
+          sweep1 = atof_spice(argv[4]);
+          sweep2 = atof_spice(argv[5]);
         }
         if(argc > 3) res = raw_read(f, &xctx->raw, argv[3], sweep1, sweep2);
         else res = raw_read(f, &xctx->raw, NULL, -1.0, -1.0);