diff --git a/include/hamlib/rig.h b/include/hamlib/rig.h
index 574c21bdd..5dbb5a7be 100644
--- a/include/hamlib/rig.h
+++ b/include/hamlib/rig.h
@@ -1675,7 +1675,7 @@ typedef struct cal_table_float cal_table_float_t;
 //! @cond Doxygen_Suppress
 #define EMPTY_FLOAT_CAL { 0, { { 0, 0f }, } }
 
-typedef int (* chan_cb_t)(RIG *, channel_t **, int, const chan_t *, rig_ptr_t);
+typedef int (* chan_cb_t)(RIG *, vfo_t vfo, channel_t **, int, const chan_t *, rig_ptr_t);
 typedef int (* confval_cb_t)(RIG *,
                              const struct confparams *,
                              value_t *,
@@ -2024,10 +2024,12 @@ struct rig_caps {
     int (*get_chan_all_cb)(RIG *rig, vfo_t vfo, chan_cb_t chan_cb, rig_ptr_t);
 
     int (*set_mem_all_cb)(RIG *rig,
+                          vfo_t vfo,
                           chan_cb_t chan_cb,
                           confval_cb_t parm_cb,
                           rig_ptr_t);
     int (*get_mem_all_cb)(RIG *rig,
+                          vfo_t vfo,
                           chan_cb_t chan_cb,
                           confval_cb_t parm_cb,
                           rig_ptr_t);
diff --git a/rigs/aor/aor.c b/rigs/aor/aor.c
index ad4331d92..3f69d7237 100644
--- a/rigs/aor/aor.c
+++ b/rigs/aor/aor.c
@@ -1364,7 +1364,7 @@ int aor_get_chan_all_cb(RIG *rig, vfo_t vfo, chan_cb_t chan_cb, rig_ptr_t arg)
      * future data for channel channel_num
      */
     chan = NULL;
-    retval = chan_cb(rig, &chan, chan_next, chan_list, arg);
+    retval = chan_cb(rig, vfo, &chan, chan_next, chan_list, arg);
 
     if (retval != RIG_OK)
     {
@@ -1414,7 +1414,7 @@ int aor_get_chan_all_cb(RIG *rig, vfo_t vfo, chan_cb_t chan_cb, rig_ptr_t arg)
              * provide application with channel data,
              * and ask for a new channel structure
              */
-            chan_cb(rig, &chan, chan_next, chan_list, arg);
+            chan_cb(rig, vfo, &chan, chan_next, chan_list, arg);
 
             if (j >= LINES_PER_MA - 1)
             {
diff --git a/src/mem.c b/src/mem.c
index 8aa51e574..a6d72e599 100644
--- a/src/mem.c
+++ b/src/mem.c
@@ -954,7 +954,7 @@ int get_chan_all_cb_generic(RIG *rig, vfo_t vfo, chan_cb_t chan_cb,
          * future data for channel channel_num
          */
         chan = NULL;
-        retval = chan_cb(rig, &chan, chan_list[i].startc, chan_list, arg);
+        retval = chan_cb(rig, vfo, &chan, chan_list[i].startc, chan_list, arg);
 
         if (retval != RIG_OK)
         {
@@ -995,7 +995,7 @@ int get_chan_all_cb_generic(RIG *rig, vfo_t vfo, chan_cb_t chan_cb,
 
             chan_next = j < chan_list[i].endc ? j + 1 : j;
 
-            chan_cb(rig, &chan, chan_next, chan_list, arg);
+            chan_cb(rig, vfo, &chan, chan_next, chan_list, arg);
         }
     }
 
@@ -1016,7 +1016,7 @@ int set_chan_all_cb_generic(RIG *rig, vfo_t vfo, chan_cb_t chan_cb,
         for (j = chan_list[i].startc; j <= chan_list[i].endc; j++)
         {
 
-            chan_cb(rig, &chan, j, chan_list, arg);
+            chan_cb(rig, vfo, &chan, j, chan_list, arg);
             chan->vfo = RIG_VFO_MEM;
 
             retval = rig_set_channel(rig, vfo, chan);
@@ -1044,6 +1044,7 @@ struct map_all_s
  * chan_cb_t to be used for non cb get/set_all
  */
 static int map_chan(RIG *rig,
+                    vfo_t vfo,
                     channel_t **chan,
                     int channel_num,
                     const chan_t *chan_list,
@@ -1343,7 +1344,7 @@ int HAMLIB_API rig_set_mem_all_cb(RIG *rig,
 
     if (rc->set_mem_all_cb)
     {
-        return rc->set_mem_all_cb(rig, chan_cb, parm_cb, arg);
+        return rc->set_mem_all_cb(rig, vfo, chan_cb, parm_cb, arg);
     }
 
 
@@ -1411,7 +1412,7 @@ int HAMLIB_API rig_get_mem_all_cb(RIG *rig,
 
     if (rc->get_mem_all_cb)
     {
-        return rc->get_mem_all_cb(rig, chan_cb, parm_cb, arg);
+        return rc->get_mem_all_cb(rig, vfo, chan_cb, parm_cb, arg);
     }
 
     /* if not available, emulate it */
@@ -1480,7 +1481,7 @@ int HAMLIB_API rig_set_mem_all(RIG *rig,
     mem_all_arg.vals = (value_t *) vals;
 
     if (rc->set_mem_all_cb)
-        return rc->set_mem_all_cb(rig, map_chan, map_parm,
+        return rc->set_mem_all_cb(rig, vfo, map_chan, map_parm,
                                   (rig_ptr_t)&mem_all_arg);
 
     /* if not available, emulate it */
@@ -1548,7 +1549,7 @@ int HAMLIB_API rig_get_mem_all(RIG *rig,
     mem_all_arg.vals = vals;
 
     if (rc->get_mem_all_cb)
-        return rc->get_mem_all_cb(rig, map_chan, map_parm,
+        return rc->get_mem_all_cb(rig, vfo, map_chan, map_parm,
                                   (rig_ptr_t)&mem_all_arg);
 
     /*
diff --git a/tests/testcaps.sh b/tests/testcaps.sh
new file mode 100755
index 000000000..7032a2ce4
--- /dev/null
+++ b/tests/testcaps.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+model=1
+riglist=`rigctl -l | cut -c1-8 | grep -v Rig | tr -d '\n'`
+for model in $riglist
+do
+   result=`rigctl -m $model -u 2>/dev/null | grep warnings`
+#   if [[ "$result" == *"warnings: 0"* ]];then
+       echo $model " " $result
+#   fi
+
+    model=`expr $model + 1`
+done