diff --git a/rowers/interactiveplots.py b/rowers/interactiveplots.py
index eb06995d..e725c7c4 100644
--- a/rowers/interactiveplots.py
+++ b/rowers/interactiveplots.py
@@ -408,55 +408,85 @@ def interactive_forcecurve(theworkouts,workstrokesonly=True,plottype='scatter'):
 
     # quick linear regression
     # peakforce = slope*peakforceangle + intercept
-    slope, intercept, r,p,stderr = linregress(rowdata['peakforceangle'],rowdata['peakforce'])
+    try:
+        slope, intercept, r,p,stderr = linregress(rowdata['peakforceangle'],rowdata['peakforce'])
+    except KeyError:
+        slope = 0
+        intercept = 0
 
-    covariancematrix = np.cov(rowdata['peakforceangle'],y=rowdata['peakforce'])
-    eig_vals, eig_vecs = np.linalg.eig(covariancematrix)
+    try:
+        covariancematrix = np.cov(rowdata['peakforceangle'],y=rowdata['peakforce'])
+        eig_vals, eig_vecs = np.linalg.eig(covariancematrix)
 
-    a = rowdata['peakforceangle']-rowdata['peakforceangle'].median()
-    F = rowdata['peakforce']-rowdata['peakforce'].median()
+        a = rowdata['peakforceangle']-rowdata['peakforceangle'].median()
+        F = rowdata['peakforce']-rowdata['peakforce'].median()
 
-    Rinv = eig_vecs
-    R = np.linalg.inv(Rinv)
+        Rinv = eig_vecs
+        R = np.linalg.inv(Rinv)
 
-    x = R[0,0]*a+R[0,1]*F
-    y = R[1,0]*a+R[1,1]*F
+        x = R[0,0]*a+R[0,1]*F
+        y = R[1,0]*a+R[1,1]*F
 
 
-    x05 = x.quantile(q=0.01)
-    x25 = x.quantile(q=0.15)
-    x75 = x.quantile(q=0.85)
-    x95 = x.quantile(q=0.99)
+        x05 = x.quantile(q=0.01)
+        x25 = x.quantile(q=0.15)
+        x75 = x.quantile(q=0.85)
+        x95 = x.quantile(q=0.99)
     
-    y05 = y.quantile(q=0.01)
-    y25 = y.quantile(q=0.15)
-    y75 = y.quantile(q=0.85)
-    y95 = y.quantile(q=0.99)
-
-    a25 = Rinv[0,0]*x25 + rowdata['peakforceangle'].median()
-    F25 = Rinv[1,0]*x25 + rowdata['peakforce'].median()
-
-    a25b = Rinv[0,1]*y25 + rowdata['peakforceangle'].median()
-    F25b = Rinv[1,1]*y25 + rowdata['peakforce'].median()
-
-    a75 = Rinv[0,0]*x75 + rowdata['peakforceangle'].median()
-    F75 = Rinv[1,0]*x75 + rowdata['peakforce'].median()
-
-    a75b = Rinv[0,1]*y75 + rowdata['peakforceangle'].median()
-    F75b = Rinv[1,1]*y75 + rowdata['peakforce'].median()
+        y05 = y.quantile(q=0.01)
+        y25 = y.quantile(q=0.15)
+        y75 = y.quantile(q=0.85)
+        y95 = y.quantile(q=0.99)
 
+        a25 = Rinv[0,0]*x25 + rowdata['peakforceangle'].median()
+        F25 = Rinv[1,0]*x25 + rowdata['peakforce'].median()
+        
+        a25b = Rinv[0,1]*y25 + rowdata['peakforceangle'].median()
+        F25b = Rinv[1,1]*y25 + rowdata['peakforce'].median()
+        
+        a75 = Rinv[0,0]*x75 + rowdata['peakforceangle'].median()
+        F75 = Rinv[1,0]*x75 + rowdata['peakforce'].median()
+        
+        a75b = Rinv[0,1]*y75 + rowdata['peakforceangle'].median()
+        F75b = Rinv[1,1]*y75 + rowdata['peakforce'].median()
+        
     
-    a05 = Rinv[0,0]*x05 + rowdata['peakforceangle'].median()
-    F05 = Rinv[1,0]*x05 + rowdata['peakforce'].median()
-
-    a05b = Rinv[0,1]*y05 + rowdata['peakforceangle'].median()
-    F05b = Rinv[1,1]*y05 + rowdata['peakforce'].median()
-
-    a95 = Rinv[0,0]*x95 + rowdata['peakforceangle'].median()
-    F95 = Rinv[1,0]*x95 + rowdata['peakforce'].median()
-
-    a95b = Rinv[0,1]*y95 + rowdata['peakforceangle'].median()
-    F95b = Rinv[1,1]*y95 + rowdata['peakforce'].median()
+        a05 = Rinv[0,0]*x05 + rowdata['peakforceangle'].median()
+        F05 = Rinv[1,0]*x05 + rowdata['peakforce'].median()
+        
+        a05b = Rinv[0,1]*y05 + rowdata['peakforceangle'].median()
+        F05b = Rinv[1,1]*y05 + rowdata['peakforce'].median()
+        
+        a95 = Rinv[0,0]*x95 + rowdata['peakforceangle'].median()
+        F95 = Rinv[1,0]*x95 + rowdata['peakforce'].median()
+        
+        a95b = Rinv[0,1]*y95 + rowdata['peakforceangle'].median()
+        F95b = Rinv[1,1]*y95 + rowdata['peakforce'].median()
+    except KeyError:
+        a25 = 0
+        F25 = 0
+        
+        a25b = 0
+        F25b = 0
+        
+        a75 = 0
+        F75 = 0
+        
+        a75b = 0
+        F75b = 0
+        
+    
+        a05 = 0
+        F05 = 0
+        
+        a05b = 0
+        F05b = 0
+        
+        a95 = 0
+        F95 = 0
+        
+        a95b = 0
+        F95b = 0
 
     
 
@@ -578,8 +608,6 @@ def interactive_forcecurve(theworkouts,workstrokesonly=True,plottype='scatter'):
         ]
 
 
-    hull2575 = ConvexHull(points2575)
-
     
     angles2575 = []
     forces2575 = []
@@ -711,21 +739,25 @@ def interactive_forcecurve(theworkouts,workstrokesonly=True,plottype='scatter'):
         multilinedatax = []
         multilinedatay = []
         for i in range(len(rowdata)):
-            x = [
-                rowdata['catch'].values[i],
-                rowdata['slip'].values[i]+rowdata['catch'].values[i],
-                rowdata['peakforceangle'].values[i],
-                rowdata['finish'].values[i]-rowdata['wash'].values[i],
-                rowdata['finish'].values[i]
+            try:
+                x = [
+                    rowdata['catch'].values[i],
+                    rowdata['slip'].values[i]+rowdata['catch'].values[i],
+                    rowdata['peakforceangle'].values[i],
+                    rowdata['finish'].values[i]-rowdata['wash'].values[i],
+                    rowdata['finish'].values[i]
                 ]
 
 
-            y = [
-                0,
-                thresholdforce,
-                rowdata['peakforce'].values[i],
-                thresholdforce,
-                0]
+                y = [
+                    0,
+                    thresholdforce,
+                    rowdata['peakforce'].values[i],
+                    thresholdforce,
+                    0]
+            except KeyError:
+                x = [0,0]
+                y = [0,0]
 
             multilinedatax.append(x)
             multilinedatay.append(y)