BUG: boundaryData export not working in v1612+

Attached example illustrating the issue. pitzDaily_boundaryData-export.tgz

in v1612+

<pss@punwor073 11:53> l postProcessing/surfaces/outlet/
total 4
-rw-r--r-- 1 pss users 2090 Jan 23 11:53 points

in v1606+

<pss@punwor073 11:55> l postProcessing/surfaces/outlet/
total 24
-rw-r--r-- 1 pss users 2090 Jan 23 11:55 points
drwxr-xr-x 2 pss users 4096 Jan 23 11:55 5
drwxr-xr-x 2 pss users 4096 Jan 23 11:55 4
drwxr-xr-x 2 pss users 4096 Jan 23 11:55 3
drwxr-xr-x 2 pss users 4096 Jan 23 11:55 2
drwxr-xr-x 2 pss users 4096 Jan 23 11:55 1

@andy