diff --git a/client/project.cpp b/client/project.cpp
index 584174e37c..e44eb9382c 100644
--- a/client/project.cpp
+++ b/client/project.cpp
@@ -109,6 +109,7 @@ void PROJECT::init() {
     completions_ratio_stdev = 0.1;  // for the first couple of completions - guess.
     completions_required_stdevs = 3.0;
     result_index = 0;
+    ignore = false;
 #endif
 }
 
diff --git a/client/project.h b/client/project.h
index 5974e2fbff..c599c3a34b 100644
--- a/client/project.h
+++ b/client/project.h
@@ -331,6 +331,7 @@ struct PROJECT : PROJ_AM {
     bool idle;
     int max_infeasible_count;
     bool no_apps;
+    bool ignore;
     // for DCF variants:
     int completed_task_count;
     double completions_ratio_mean;
diff --git a/client/sim.cpp b/client/sim.cpp
index f4bfc49738..9a59210231 100644
--- a/client/sim.cpp
+++ b/client/sim.cpp
@@ -1311,21 +1311,48 @@ void cull_projects() {
             app->project->no_apps = false;
         }
     }
-    vector<PROJECT*>::iterator iter;
-    iter = gstate.projects.begin();
-    while (iter != gstate.projects.end()) {
-        p = *iter;
+    for (i=0; i<gstate.projects.size(); i++) {
+        p = gstate.projects[i];
         if (p->no_apps) {
             fprintf(summary_file,
                 "%s: Removing from simulation - no apps\n",
                 p->project_name
             );
-            iter = gstate.projects.erase(iter);
+            p->ignore = true;
         } else if (p->non_cpu_intensive) {
             fprintf(summary_file,
                 "%s: Removing from simulation - non CPU intensive\n",
                 p->project_name
             );
+            p->ignore = true;
+        }
+    }
+
+    // remove results and active tasks of projects we're culling
+    //
+    vector<ACTIVE_TASK*>::iterator ati = gstate.active_tasks.active_tasks.begin();
+    while (ati != gstate.active_tasks.active_tasks.end()) {
+        ACTIVE_TASK* atp = *ati;
+        if (atp->wup->project->ignore) {
+            ati = gstate.active_tasks.active_tasks.erase(ati);
+        } else {
+            ati++;
+        }
+    }
+    vector<RESULT*>::iterator ri = gstate.results.begin();
+    while (ri != gstate.results.end()) {
+        RESULT* rp = *ri;
+        if (rp->project->ignore) {
+            ri = gstate.results.erase(ri);
+        } else {
+            ri++;
+        }
+    }
+
+    vector<PROJECT*>::iterator iter = gstate.projects.begin();
+    while (iter != gstate.projects.end()) {
+        p = *iter;
+        if (p->ignore) {
             iter = gstate.projects.erase(iter);
         } else {
             iter++;