Index: /issm/trunk-jpl/src/m/classes/stochasticforcing.py
===================================================================
--- /issm/trunk-jpl/src/m/classes/stochasticforcing.py	(revision 26646)
+++ /issm/trunk-jpl/src/m/classes/stochasticforcing.py	(revision 26647)
@@ -146,5 +146,5 @@
             WriteData(fid, prefix, 'object', self, 'fieldname', 'fields', 'format', 'StringArray')
             WriteData(fid, prefix, 'data', dimensions, 'name', 'md.stochasticforcing.dimensions', 'format', 'IntMat')
-            WriteData(fid, prefix, 'object', self, 'fieldname', 'default_id', 'format', 'IntMat')  #12Nov2021 make sure this is zero-indexed!
+            WriteData(fid, prefix, 'object', self, 'fieldname', 'default_id', 'format', 'IntMat', 'mattype', 2)  #12Nov2021 make sure this is zero-indexed!
             WriteData(fid, prefix, 'object', self, 'fieldname', 'defaultdimension', 'format', 'Integer')
             WriteData(fid, prefix, 'data', tempcovariance, 'name', 'md.stochasticforcing.covariance', 'format', 'DoubleMat')