Index: /issm/trunk-jpl/src/m/solve/WriteData.py
===================================================================
--- /issm/trunk-jpl/src/m/solve/WriteData.py	(revision 23767)
+++ /issm/trunk-jpl/src/m/solve/WriteData.py	(revision 23768)
@@ -65,5 +65,5 @@
 
 		#first write length of record
-		fid.write(pack('i',4+4))  #1 bool (disguised as an int)+code
+		fid.write(pack('q',4+4))  #1 bool (disguised as an int)+code
 
 		#write data code:
@@ -79,5 +79,5 @@
 
 		#first write length of record
-		fid.write(pack('i',4+4))  #1 integer + code
+		fid.write(pack('q',4+4))  #1 integer + code
 
 		#write data code:
@@ -93,5 +93,5 @@
 
 		#first write length of record
-		fid.write(pack('i',8+4))  #1 double+code
+		fid.write(pack('q',8+4))  #1 double+code
 
 		#write data code:
@@ -104,5 +104,5 @@
 	elif datatype=='String':    # {{{
 		#first write length of record
-		fid.write(pack('i',len(data)+4+4))  #string + string size + code
+		fid.write(pack('q',len(data)+4+4))  #string + string size + code
 
 		#write data code:
@@ -133,5 +133,5 @@
 
 		#first write length of record
-		fid.write(pack('i',4+4+8*np.product(s)+4+4))    #2 integers (32 bits) + the double matrix + code + matrix type
+		fid.write(pack('q',4+4+8*np.product(s)+4+4))    #2 integers (32 bits) + the double matrix + code + matrix type
 
 		#write data code and matrix type:
@@ -176,5 +176,5 @@
 			raise ValueError('field {} cannot be marshalled because it is larger than 4^31 bytes!'.format(enum))
 
-		fid.write(pack('i',recordlength))  #2 integers (32 bits) + the double matrix + code + matrix type
+		fid.write(pack('q',recordlength))  #2 integers (32 bits) + the double matrix + code + matrix type
 
 		#write data code and matrix type:
@@ -225,5 +225,5 @@
 			raise ValueError('field %s cannot be marshalled because it is larger than 4^31 bytes!' % enum)
 
-		fid.write(pack('i',recordlength))  #2 integers (32 bits) + the matrix + code + matrix type
+		fid.write(pack('q',recordlength))  #2 integers (32 bits) + the matrix + code + matrix type
 
 		#write data code and matrix type:
@@ -285,5 +285,5 @@
 
 		#write length of record
-		fid.write(pack('i',recordlength))
+		fid.write(pack('q',recordlength))
 
 		#write data code:
@@ -324,5 +324,5 @@
 
 		#write length of record
-		fid.write(pack('i',recordlength))
+		fid.write(pack('q',recordlength))
 
 		#write data code: