diff --git a/build/websnark.js b/build/websnark.js
index 9b71ef9..9658277 100644
--- a/build/websnark.js
+++ b/build/websnark.js
@@ -1657,7 +1657,7 @@ function thread(self) {
 
             instance.exports.fft_ifft(pPolA2, domainSize*2, 0);
 
-            instance.exports.fft_fromMontgomeryN(pPolA2+domainSize*32, pPolA2+domainSize*32, nSignals);
+            instance.exports.fft_fromMontgomeryN(pPolA2+domainSize*32, pPolA2+domainSize*32, domainSize);
 
             data.result = getBin(pPolA2+domainSize*32, domainSize*32);
             i32[0] = oldAlloc;
@@ -1991,6 +1991,12 @@ class Groth16 {
 
 
         const pH = this.calcH(signals.slice(0), polsA, polsB, nSignals, domainSize).then( (h) => {
+/* Debug code to print the result of h
+            for (let i=0; i<domainSize; i++) {
+                const a = this.bin2int(h.slice(i*32, i*32+32));
+                console.log(i + " -> " + a.toString());
+            }
+*/
             return this.g1_multiexp(h, pointsHExps);
         });
 
@@ -2040,6 +2046,10 @@ class Groth16 {
             this.putBin(ps, bs);
         }
 
+/// Uncoment it to debug and check it works
+//        this.instance.exports.f1m_zero(pr);
+//        this.instance.exports.f1m_zero(ps);
+
         // pi_a = pi_a + Alfa1 + r*Delta1
         this.instance.exports.g1_add(pAlfa1, pi_a, pi_a);
         this.instance.exports.g1_timesScalar(pDelta1, pr, 32, aux1);
@@ -2060,6 +2070,7 @@ class Groth16 {
         this.putBin(aux1, res[4]);
         this.instance.exports.g1_add(aux1, pi_c, pi_c);
 
+
         // pi_c = pi_c + s*pi_a
         this.instance.exports.g1_timesScalar(pi_a, ps, 32, aux1);
         this.instance.exports.g1_add(aux1, pi_c, pi_c);
diff --git a/example/proof.json b/example/proof.json
index a336c1f..1740cf1 100644
--- a/example/proof.json
+++ b/example/proof.json
@@ -1,17 +1,17 @@
 {
  "pi_a": [
-  "21299468428975157907971509843242790611956840031982109540080148460860054961068",
-  "16218562239871505083548927620326532327685583756957331621908222303280694697058",
+  "21266998874284424955919569029881989465699205822263354313670808828909395154496",
+  "13808207576200570409195938017448994370347750586807229689124956313666939364223",
   "1"
  ],
  "pi_b": [
   [
-   "3990093423700828311838231842021296772880795509915393919119908397509245494630",
-   "9935722568224593716709531459846007601397798580251740830053012576354022332241"
+   "20826174028125964218380958569361176477127093215239661788856774751838141561143",
+   "18124837593398705925374973761391356712682789028723957898056733210681657516129"
   ],
   [
-   "21666639296245372573730164687386555903413178611772851802112755493707480411718",
-   "20480827377835335108619082478623567541229122073863081725837512367680199835917"
+   "11061422325891624289091287264538564377906983481144726751439738589444312205684",
+   "7233025874448062341952037774861209177679802086176943726704101043680595476782"
   ],
   [
    "1",
@@ -19,8 +19,8 @@
   ]
  ],
  "pi_c": [
-  "13342643079462362387238709887432684790096854916120073722409236990698569347488",
-  "10435157339334380790943583827752333771606989087519357640989102922869580065639",
+  "16878419494624994424179370797390123339814891459464251523862017440818718425099",
+  "2746788445790348352996135341367179450489222192737650564198988415207995710311",
   "1"
  ]
 }
diff --git a/example/websnark.js b/example/websnark.js
index 9b71ef9..9658277 100644
--- a/example/websnark.js
+++ b/example/websnark.js
@@ -1657,7 +1657,7 @@ function thread(self) {
 
             instance.exports.fft_ifft(pPolA2, domainSize*2, 0);
 
-            instance.exports.fft_fromMontgomeryN(pPolA2+domainSize*32, pPolA2+domainSize*32, nSignals);
+            instance.exports.fft_fromMontgomeryN(pPolA2+domainSize*32, pPolA2+domainSize*32, domainSize);
 
             data.result = getBin(pPolA2+domainSize*32, domainSize*32);
             i32[0] = oldAlloc;
@@ -1991,6 +1991,12 @@ class Groth16 {
 
 
         const pH = this.calcH(signals.slice(0), polsA, polsB, nSignals, domainSize).then( (h) => {
+/* Debug code to print the result of h
+            for (let i=0; i<domainSize; i++) {
+                const a = this.bin2int(h.slice(i*32, i*32+32));
+                console.log(i + " -> " + a.toString());
+            }
+*/
             return this.g1_multiexp(h, pointsHExps);
         });
 
@@ -2040,6 +2046,10 @@ class Groth16 {
             this.putBin(ps, bs);
         }
 
+/// Uncoment it to debug and check it works
+//        this.instance.exports.f1m_zero(pr);
+//        this.instance.exports.f1m_zero(ps);
+
         // pi_a = pi_a + Alfa1 + r*Delta1
         this.instance.exports.g1_add(pAlfa1, pi_a, pi_a);
         this.instance.exports.g1_timesScalar(pDelta1, pr, 32, aux1);
@@ -2060,6 +2070,7 @@ class Groth16 {
         this.putBin(aux1, res[4]);
         this.instance.exports.g1_add(aux1, pi_c, pi_c);
 
+
         // pi_c = pi_c + s*pi_a
         this.instance.exports.g1_timesScalar(pi_a, ps, 32, aux1);
         this.instance.exports.g1_add(aux1, pi_c, pi_c);
diff --git a/src/groth16.js b/src/groth16.js
index 70d9ded..b9e66ea 100644
--- a/src/groth16.js
+++ b/src/groth16.js
@@ -154,7 +154,7 @@ function thread(self) {
 
             instance.exports.fft_ifft(pPolA2, domainSize*2, 0);
 
-            instance.exports.fft_fromMontgomeryN(pPolA2+domainSize*32, pPolA2+domainSize*32, nSignals);
+            instance.exports.fft_fromMontgomeryN(pPolA2+domainSize*32, pPolA2+domainSize*32, domainSize);
 
             data.result = getBin(pPolA2+domainSize*32, domainSize*32);
             i32[0] = oldAlloc;
@@ -488,6 +488,12 @@ class Groth16 {
 
 
         const pH = this.calcH(signals.slice(0), polsA, polsB, nSignals, domainSize).then( (h) => {
+/* Debug code to print the result of h
+            for (let i=0; i<domainSize; i++) {
+                const a = this.bin2int(h.slice(i*32, i*32+32));
+                console.log(i + " -> " + a.toString());
+            }
+*/
             return this.g1_multiexp(h, pointsHExps);
         });
 
@@ -537,6 +543,10 @@ class Groth16 {
             this.putBin(ps, bs);
         }
 
+/// Uncoment it to debug and check it works
+//        this.instance.exports.f1m_zero(pr);
+//        this.instance.exports.f1m_zero(ps);
+
         // pi_a = pi_a + Alfa1 + r*Delta1
         this.instance.exports.g1_add(pAlfa1, pi_a, pi_a);
         this.instance.exports.g1_timesScalar(pDelta1, pr, 32, aux1);
@@ -557,6 +567,7 @@ class Groth16 {
         this.putBin(aux1, res[4]);
         this.instance.exports.g1_add(aux1, pi_c, pi_c);
 
+
         // pi_c = pi_c + s*pi_a
         this.instance.exports.g1_timesScalar(pi_a, ps, 32, aux1);
         this.instance.exports.g1_add(aux1, pi_c, pi_c);