Index: /issm/trunk-jpl/externalpackages/gmt/install-6-linux-static.sh
===================================================================
--- /issm/trunk-jpl/externalpackages/gmt/install-6-linux-static.sh	(revision 27699)
+++ /issm/trunk-jpl/externalpackages/gmt/install-6-linux-static.sh	(revision 27700)
@@ -5,5 +5,5 @@
 ## Constants
 #
-VER="6.0.0"
+VER="6.4.0"
 
 # Find libgfortran and libgcc so we do not have to hardcode them
Index: /issm/trunk-jpl/externalpackages/gmt/install-6-linux.sh
===================================================================
--- /issm/trunk-jpl/externalpackages/gmt/install-6-linux.sh	(revision 27699)
+++ /issm/trunk-jpl/externalpackages/gmt/install-6-linux.sh	(revision 27700)
@@ -5,5 +5,5 @@
 ## Constants
 #
-VER="6.0.0"
+VER="6.4.0"
 
 # Find libgfortran so that we do not have to hardcode it.
Index: /issm/trunk-jpl/externalpackages/gmt/install-6-mac-intel-static.sh
===================================================================
--- /issm/trunk-jpl/externalpackages/gmt/install-6-mac-intel-static.sh	(revision 27699)
+++ /issm/trunk-jpl/externalpackages/gmt/install-6-mac-intel-static.sh	(revision 27700)
@@ -5,5 +5,5 @@
 ## Constants
 #
-VER="6.0.0"
+VER="6.4.0"
 
 # Find libgfortran and libgcc so we do not have to hardcode them
Index: /issm/trunk-jpl/externalpackages/gmt/install-6-mac-intel.sh
===================================================================
--- /issm/trunk-jpl/externalpackages/gmt/install-6-mac-intel.sh	(revision 27699)
+++ /issm/trunk-jpl/externalpackages/gmt/install-6-mac-intel.sh	(revision 27700)
@@ -5,5 +5,5 @@
 ## Constants
 #
-VER="6.0.0"
+VER="6.4.0"
 
 # Find libgfortran so that we do not have to hardcode it.
Index: /issm/trunk-jpl/externalpackages/gmt/install-6-mac-silicon.sh
===================================================================
--- /issm/trunk-jpl/externalpackages/gmt/install-6-mac-silicon.sh	(revision 27699)
+++ /issm/trunk-jpl/externalpackages/gmt/install-6-mac-silicon.sh	(revision 27700)
@@ -5,5 +5,5 @@
 ## Constants
 #
-VER="6.0.0"
+VER="6.4.0"
 
 # Find libgfortran so that we do not have to hardcode it.