Index: /issm/trunk-jpl/src/m/interp/interp.py
===================================================================
--- /issm/trunk-jpl/src/m/interp/interp.py	(revision 27525)
+++ /issm/trunk-jpl/src/m/interp/interp.py	(revision 27526)
@@ -54,5 +54,5 @@
     xflag = np.logical_and(x > xlim[0], x < xlim[1])
     yflag = np.logical_and(y > ylim[0], y < ylim[1])
-    bothind = np.nonzero(np.logical_and(xflag, yflag))
+    bothind = np.squeeze(np.where(np.logical_and(xflag, yflag))).astype(int)
     subdata = data[bothind]
     subx = x[bothind]