diff --git a/andorApp/src/andorCCD.cpp b/andorApp/src/andorCCD.cpp
index a9345e5..dbfa10c 100755
--- a/andorApp/src/andorCCD.cpp
+++ b/andorApp/src/andorCCD.cpp
@@ -901,17 +901,25 @@ void AndorCCD::setupTrackDefn(int minX, int sizeX, int binX)
     setIntegerParam(NDArraySizeY, mMultiTrack.DataHeight());
     for (size_t TrackNo = 0; TrackNo < mMultiTrack.size(); TrackNo++)
     {
-        /*
-        Each track must be defined by a group of six integers.
-            - The top and bottom positions of the tracks.
-            - The left and right positions for the area of interest within each track
-            - The horizontal and vertical binning for each track. */
-        TrackDefn[TrackNo * 6 + 0] = mMultiTrack.TrackStart(TrackNo);
-        TrackDefn[TrackNo * 6 + 1] = mMultiTrack.TrackEnd(TrackNo);
-        TrackDefn[TrackNo * 6 + 2] = minX + 1;
-        TrackDefn[TrackNo * 6 + 3] = minX + sizeX;
-        TrackDefn[TrackNo * 6 + 4] = binX;
-        TrackDefn[TrackNo * 6 + 5] = mMultiTrack.TrackBin(TrackNo);
+        /*
+        Each track must be defined by a group of six integers.
+            - The top and bottom positions of the tracks.
+            - The left and right positions for the area of interest within each track
+            - The horizontal and vertical binning for each track. */
+        /*
+        Andor use 1-based exclusive co-ordinates.
+        e.g. from SDK manual:
+        1 2 1 1024 1 1
+        3 4 1 1024 1 1
+        5 6 1 1024 1 1
+        7 8 1 1024 1 1
+        9 10 1 1024 1 1 */
+        TrackDefn[TrackNo * 6 + 0] = mMultiTrack.TrackStart(TrackNo) + 1;
+        TrackDefn[TrackNo * 6 + 1] = mMultiTrack.TrackEnd(TrackNo) + 2; // CCDMultiTrack uses 0-based inlcusive co-ordinates.
+        TrackDefn[TrackNo * 6 + 2] = minX + 1;
+        TrackDefn[TrackNo * 6 + 3] = minX + sizeX;
+        TrackDefn[TrackNo * 6 + 4] = binX;
+        TrackDefn[TrackNo * 6 + 5] = mMultiTrack.TrackBin(TrackNo);
     }
     checkStatus(SetCustomTrackHBin(binX));
     checkStatus(SetComplexImage(int(TrackDefn.size() / ValuesPerTrack), &TrackDefn[0]));