Index: /issm/trunk-jpl/src/m/solve/waitonlock.m
===================================================================
--- /issm/trunk-jpl/src/m/solve/waitonlock.m	(revision 17590)
+++ /issm/trunk-jpl/src/m/solve/waitonlock.m	(revision 17591)
@@ -17,5 +17,5 @@
 cluster       = md.cluster;
 
-if isa(cluster,'pfe')
+if isa(cluster,'pfe') && cluster.interactive>0
 	lockfilename  = [executionpath '/Interactive' num2str(cluster.interactive) '/' md.miscellaneous.name '.lock'];
 	logfilename   = [executionpath '/Interactive' num2str(cluster.interactive) '/' md.miscellaneous.name '.outlog'];