Index: trunk/ippTools/src/stacktool.c
===================================================================
--- trunk/ippTools/src/stacktool.c	(revision 37095)
+++ trunk/ippTools/src/stacktool.c	(revision 37104)
@@ -260,4 +260,6 @@
     // these are used to build the HAVING restriction
     PXOPT_COPY_S32(config->args, having, "-min_num", "num_warp", ">=");
+    PXOPT_COPY_S32(config->args, having, "-max_num", "num_warp", "<=");
+    
     PXOPT_LOOKUP_S32(min_num,     config->args, "-min_num",  false, false);
     if (min_num < 2) {
Index: trunk/ippTools/src/stacktoolConfig.c
===================================================================
--- trunk/ippTools/src/stacktoolConfig.c	(revision 37095)
+++ trunk/ippTools/src/stacktoolConfig.c	(revision 37104)
@@ -98,4 +98,5 @@
     psMetadataAddS32(definebyqueryArgs, PS_LIST_TAIL, "-random", 0, "use this number of random elements", 0);
     psMetadataAddS32(definebyqueryArgs, PS_LIST_TAIL, "-min_num", 0, "minimum number of inputs", 0);
+    psMetadataAddS32(definebyqueryArgs, PS_LIST_TAIL, "-max_num", 0, "maximum number of inputs", 0);
     psMetadataAddS32(definebyqueryArgs, PS_LIST_TAIL, "-min_new", 0, "minimum number of new inputs", 0);
     psMetadataAddF32(definebyqueryArgs, PS_LIST_TAIL, "-min_frac", 0, "minumum fraction of new inputs", NAN);