Index: trunk/psModules/src/imcombine/pmSubtractionMatch.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 35821)
+++ trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 35867)
@@ -540,5 +540,5 @@
     // Bail here if we're doing the simple matching
     if (type == PM_SUBTRACTION_KERNEL_SIMPLE) {
-      if (!pmSubtractionSimpleMatch(conv1,conv2,ro1,ro2,sources,size,maskVal,maskBad,maskPoor)) {
+      if (!pmSubtractionSimpleMatch(conv1,conv2,ro1,ro2,sources,size,maskVal,maskBad,maskPoor,optThreshold)) {
 	return false;
       }
Index: trunk/psModules/src/imcombine/pmSubtractionSimple.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionSimple.c	(revision 35821)
+++ trunk/psModules/src/imcombine/pmSubtractionSimple.c	(revision 35867)
@@ -90,5 +90,6 @@
 			      psImageMaskType maskVal,
 			      psImageMaskType maskBad,
-			      psImageMaskType maskPoor
+			      psImageMaskType maskPoor,
+			      float deconvolveThreshold
 			      ) {
   //
@@ -190,13 +191,17 @@
   if (!conv1) {
     if (convolution_direction == 1) {
-      chisq = 100;
-    }
-    convolution_direction = 2;
+      if (sigma1 - sigma2 > deconvolveThreshold) {
+	chisq = 100;
+      }
+    }
+    //    convolution_direction = 2;
   }
   if (!conv2) {
     if (convolution_direction == 2) {
-      chisq = 100;
-    }
-    convolution_direction = 1;
+      if (sigma2 - sigma1 > deconvolveThreshold) {
+	chisq = 100;
+      }
+    }
+    //    convolution_direction = 1;
   }
   
@@ -249,9 +254,13 @@
   // Do convolutions
   if (convolution_direction == 1) {
-    psImageSmoothMask_Threaded(imageC1,image1,mask1,maskVal,sigmaKern,6,1e-6);
-    psImageSmoothMask_Threaded(varC1,var1,mask1,maskVal,sigmaKern * M_SQRT1_2,6,1e-6);
-    maskC1 = psImageConvolveMask(maskC1,mask1,maskVal,maskBad,
-				 -maskBox,maskBox,-maskBox,maskBox);
-    conv1->covariance = psImageCovarianceCalculate(kernel,ro1->covariance);
+    if (conv1) {
+      psImageSmoothMask_Threaded(imageC1,image1,mask1,maskVal,sigmaKern,6,1e-6);
+      psImageSmoothMask_Threaded(varC1,var1,mask1,maskVal,sigmaKern * M_SQRT1_2,6,1e-6);
+      maskC1 = psImageConvolveMask(maskC1,mask1,maskVal,maskBad,
+				   -maskBox,maskBox,-maskBox,maskBox);
+      conv1->covariance = psImageCovarianceCalculate(kernel,ro1->covariance);
+      pmSubtractionBorder(imageC1,varC1,maskC1,maskBox,maskBlank);
+      pmSubtractionMaskApply(imageC1,varC1,maskC1,PM_SUBTRACTION_MODE_1);
+    }
     if (conv2) {
       imageC2 = psImageCopy(imageC2,image2,PS_TYPE_F32);
@@ -260,13 +269,15 @@
       conv2->covariance = psMemIncrRefCounter(ro2->covariance);
     }
-    pmSubtractionBorder(imageC1,varC1,maskC1,maskBox,maskBlank);
-    pmSubtractionMaskApply(imageC1,varC1,maskC1,PM_SUBTRACTION_MODE_1);
   }
   else if (convolution_direction == 2) {
-    psImageSmoothMask_Threaded(imageC2,image2,mask2,maskVal,sigmaKern,6,1e-6);
-    psImageSmoothMask_Threaded(varC2,var2,mask2,maskVal,sigmaKern * M_SQRT1_2,6,1e-6);
-    maskC2 = psImageConvolveMask(maskC2,mask2,maskVal,maskBad,
-				 -maskBox,maskBox,-maskBox,maskBox);
-    conv2->covariance = psImageCovarianceCalculate(kernel,ro2->covariance);
+    if (conv2) {
+      psImageSmoothMask_Threaded(imageC2,image2,mask2,maskVal,sigmaKern,6,1e-6);
+      psImageSmoothMask_Threaded(varC2,var2,mask2,maskVal,sigmaKern * M_SQRT1_2,6,1e-6);
+      maskC2 = psImageConvolveMask(maskC2,mask2,maskVal,maskBad,
+				   -maskBox,maskBox,-maskBox,maskBox);
+      conv2->covariance = psImageCovarianceCalculate(kernel,ro2->covariance);
+      pmSubtractionBorder(imageC2,varC2,maskC2,maskBox,maskBlank);
+      pmSubtractionMaskApply(imageC2,varC2,maskC2,PM_SUBTRACTION_MODE_2);
+    }
     if (conv1) {
       imageC1 = psImageCopy(imageC1,image1,PS_TYPE_F32);
@@ -275,6 +286,4 @@
       conv1->covariance = psMemIncrRefCounter(ro1->covariance);
     }
-    pmSubtractionBorder(imageC2,varC2,maskC2,maskBox,maskBlank);
-    pmSubtractionMaskApply(imageC2,varC2,maskC2,PM_SUBTRACTION_MODE_2);
   }    
 
@@ -294,22 +303,18 @@
     float flux1,flux2;
 
-    if (convolution_direction == 1) {
+    if (conv1) {
       simple_do_boxphot(&nPix1,&flux1,source,imageC1,maskC1,maskBad,photRadius);
-      if (conv2) {
-	simple_do_boxphot(&nPix2,&flux2,source,imageC2,maskC2,maskBad,photRadius);
-      }
-      else {
-	simple_do_boxphot(&nPix2,&flux2,source,image2,mask2,maskBad,photRadius);
-      }
-    }
-    else if (convolution_direction == 2) {
+    }
+    else {
+      simple_do_boxphot(&nPix1,&flux1,source,image1,mask1,maskBad,photRadius);
+    }
+
+    if (conv2) {
       simple_do_boxphot(&nPix2,&flux2,source,imageC2,maskC2,maskBad,photRadius);
-      if (conv1) {
-	simple_do_boxphot(&nPix1,&flux1,source,imageC1,maskC1,maskBad,photRadius);
-      }
-      else {
-	simple_do_boxphot(&nPix1,&flux1,source,image1,mask1,maskBad,photRadius);
-      }
-    }
+    }
+    else {
+      simple_do_boxphot(&nPix2,&flux2,source,image2,mask2,maskBad,photRadius);
+    }
+
     logFluxDifferences->data.F32[i] = flux2 - flux1;
     fitMask->data.PS_TYPE_VECTOR_MASK_DATA[i] = 0;
@@ -321,5 +326,4 @@
     //    fprintf(stderr,"SOURCES: %d %g %g %g -> %d %d %g %g %d %g\n",i,source->peak->xf,source->peak->yf,source->psfMag,
     //	    nPix1,nPix2,flux1,flux2,fitMask->data.PS_TYPE_VECTOR_MASK_DATA[i],logFluxDifferences->data.F32[i]);
-    
   }
 
Index: trunk/psModules/src/imcombine/pmSubtractionSimple.h
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionSimple.h	(revision 35821)
+++ trunk/psModules/src/imcombine/pmSubtractionSimple.h	(revision 35867)
@@ -16,5 +16,6 @@
 			      psImageMaskType maskVal,
 			      psImageMaskType maskBad,
-			      psImageMaskType maskPoor
+			      psImageMaskType maskPoor,
+			      float deconvolveThreshold
 			      );