diff --git a/build/cli.cjs b/build/cli.cjs
index 6fc6e1f4..3e1079aa 100755
--- a/build/cli.cjs
+++ b/build/cli.cjs
@@ -1369,7 +1369,7 @@ async function importResponse(oldPtauFilename, contributionFilename, newPTauFile
     }
 
     if(!hashIsEqual(contributionPreviousHash,lastChallengeHash))
-        throw new Error("Wrong contribution. this contribution is not based on the previus hash");
+        throw new Error("Wrong contribution. This contribution is not based on the previous hash");
 
     const hasherResponse = new Blake2b__default["default"](64);
     hasherResponse.update(contributionPreviousHash);
@@ -2919,16 +2919,20 @@ async function exportJson(pTauFilename, verbose) {
     pTau.power = power;
     pTau.contributions = await readContributions(fd, curve, sections);
 
-    pTau.tauG1 = await exportSection(2, "G1", (2 ** power)*2 -1, "tauG1");
-    pTau.tauG2 = await exportSection(3, "G2", (2 ** power), "tauG2");
-    pTau.alphaTauG1 = await exportSection(4, "G1", (2 ** power), "alphaTauG1");
-    pTau.betaTauG1 = await exportSection(5, "G1", (2 ** power), "betaTauG1");
-    pTau.betaG2 = await exportSection(6, "G2", 1, "betaG2");
+    if (sections[2]) {
+        pTau.tauG1 = await exportSection(2, "G1", (2 ** power)*2 -1, "tauG1");
+        pTau.tauG2 = await exportSection(3, "G2", (2 ** power), "tauG2");
+        pTau.alphaTauG1 = await exportSection(4, "G1", (2 ** power), "alphaTauG1");
+        pTau.betaTauG1 = await exportSection(5, "G1", (2 ** power), "betaTauG1");
+        pTau.betaG2 = await exportSection(6, "G2", 1, "betaG2");
 
-    pTau.lTauG1 = await exportLagrange(12, "G1", "lTauG1");
-    pTau.lTauG2 = await exportLagrange(13, "G2", "lTauG2");
-    pTau.lAlphaTauG1 = await exportLagrange(14, "G1", "lAlphaTauG2");
-    pTau.lBetaTauG1 = await exportLagrange(15, "G1", "lBetaTauG2");
+        if (sections[12]) {
+            pTau.lTauG1 = await exportLagrange(12, "G1", "lTauG1");
+            pTau.lTauG2 = await exportLagrange(13, "G2", "lTauG2");
+            pTau.lAlphaTauG1 = await exportLagrange(14, "G1", "lAlphaTauG2");
+            pTau.lBetaTauG1 = await exportLagrange(15, "G1", "lBetaTauG2");
+        }
+    }
 
     await fd.close();
 
@@ -12453,14 +12457,14 @@ const commands = [
     {
         cmd: "powersoftau convert <old_powersoftau.ptau> <new_powersoftau.ptau>",
         description: "Convert ptau",
-        longDescription: " This process calculates the evaluation of the Lagrange polinomials at tau for alpha*tau and beta tau",
+        longDescription: " This process calculates the evaluation of the Lagrange polynomials at tau for alpha*tau and beta tau",
         alias: ["ptcv"],
         options: "-verbose|v",
         action: powersOfTauConvert
     },
     {
         cmd: "powersoftau truncate <powersoftau.ptau>",
-        description: "Generate diferent powers of tau with smoller sizes ",
+        description: "Generate diferent powers of tau with smaller sizes ",
         longDescription: " This process generates smaller ptau files from a bigger power ptau",
         alias: ["ptt"],
         options: "-verbose|v",
@@ -12482,7 +12486,7 @@ const commands = [
     },
     {
         cmd: "r1cs info [circuit.r1cs]",
-        description: "Print statistiscs of a circuit",
+        description: "Print statistics of a circuit",
         alias: ["ri", "info -r|r1cs:circuit.r1cs"],
         action: r1csInfo
     },
diff --git a/build/main.cjs b/build/main.cjs
index 3d8d1bf5..da07c9d2 100644
--- a/build/main.cjs
+++ b/build/main.cjs
@@ -2056,7 +2056,7 @@ async function importResponse(oldPtauFilename, contributionFilename, newPTauFile
     }
 
     if(!hashIsEqual(contributionPreviousHash,lastChallengeHash))
-        throw new Error("Wrong contribution. this contribution is not based on the previus hash");
+        throw new Error("Wrong contribution. This contribution is not based on the previous hash");
 
     const hasherResponse = new Blake2b__default["default"](64);
     hasherResponse.update(contributionPreviousHash);
diff --git a/cli.js b/cli.js
index c9eace1e..6ac12bd2 100755
--- a/cli.js
+++ b/cli.js
@@ -98,7 +98,7 @@ const commands = [
     {
         cmd: "powersoftau prepare phase2 <powersoftau.ptau> <new_powersoftau.ptau>",
         description: "Prepares phase 2. ",
-        longDescription: " This process calculates the evaluation of the Lagrange polinomials at tau for alpha*tau and beta tau",
+        longDescription: " This process calculates the evaluation of the Lagrange polynomials at tau for alpha*tau and beta tau",
         alias: ["pt2"],
         options: "-verbose|v",
         action: powersOfTauPreparePhase2
@@ -106,14 +106,14 @@ const commands = [
     {
         cmd: "powersoftau convert <old_powersoftau.ptau> <new_powersoftau.ptau>",
         description: "Convert ptau",
-        longDescription: " This process calculates the evaluation of the Lagrange polinomials at tau for alpha*tau and beta tau",
+        longDescription: " This process calculates the evaluation of the Lagrange polynomials at tau for alpha*tau and beta tau",
         alias: ["ptcv"],
         options: "-verbose|v",
         action: powersOfTauConvert
     },
     {
         cmd: "powersoftau truncate <powersoftau.ptau>",
-        description: "Generate diferent powers of tau with smoller sizes ",
+        description: "Generate diferent powers of tau with smaller sizes ",
         longDescription: " This process generates smaller ptau files from a bigger power ptau",
         alias: ["ptt"],
         options: "-verbose|v",
@@ -135,7 +135,7 @@ const commands = [
     },
     {
         cmd: "r1cs info [circuit.r1cs]",
-        description: "Print statistiscs of a circuit",
+        description: "Print statistics of a circuit",
         alias: ["ri", "info -r|r1cs:circuit.r1cs"],
         action: r1csInfo
     },
diff --git a/src/powersoftau_export_json.js b/src/powersoftau_export_json.js
index 7f308144..60a0fccc 100644
--- a/src/powersoftau_export_json.js
+++ b/src/powersoftau_export_json.js
@@ -31,16 +31,20 @@ export default async function exportJson(pTauFilename, verbose) {
     pTau.power = power;
     pTau.contributions = await utils.readContributions(fd, curve, sections);
 
-    pTau.tauG1 = await exportSection(2, "G1", (2 ** power)*2 -1, "tauG1");
-    pTau.tauG2 = await exportSection(3, "G2", (2 ** power), "tauG2");
-    pTau.alphaTauG1 = await exportSection(4, "G1", (2 ** power), "alphaTauG1");
-    pTau.betaTauG1 = await exportSection(5, "G1", (2 ** power), "betaTauG1");
-    pTau.betaG2 = await exportSection(6, "G2", 1, "betaG2");
-
-    pTau.lTauG1 = await exportLagrange(12, "G1", "lTauG1");
-    pTau.lTauG2 = await exportLagrange(13, "G2", "lTauG2");
-    pTau.lAlphaTauG1 = await exportLagrange(14, "G1", "lAlphaTauG2");
-    pTau.lBetaTauG1 = await exportLagrange(15, "G1", "lBetaTauG2");
+    if (sections[2]) {
+        pTau.tauG1 = await exportSection(2, "G1", (2 ** power)*2 -1, "tauG1");
+        pTau.tauG2 = await exportSection(3, "G2", (2 ** power), "tauG2");
+        pTau.alphaTauG1 = await exportSection(4, "G1", (2 ** power), "alphaTauG1");
+        pTau.betaTauG1 = await exportSection(5, "G1", (2 ** power), "betaTauG1");
+        pTau.betaG2 = await exportSection(6, "G2", 1, "betaG2");
+
+        if (sections[12]) {
+            pTau.lTauG1 = await exportLagrange(12, "G1", "lTauG1");
+            pTau.lTauG2 = await exportLagrange(13, "G2", "lTauG2");
+            pTau.lAlphaTauG1 = await exportLagrange(14, "G1", "lAlphaTauG2");
+            pTau.lBetaTauG1 = await exportLagrange(15, "G1", "lBetaTauG2");
+        }
+    }
 
     await fd.close();
 
diff --git a/src/powersoftau_import.js b/src/powersoftau_import.js
index 12763e31..4625e18a 100644
--- a/src/powersoftau_import.js
+++ b/src/powersoftau_import.js
@@ -73,7 +73,7 @@ export default async function importResponse(oldPtauFilename, contributionFilena
     }
 
     if(!misc.hashIsEqual(contributionPreviousHash,lastChallengeHash))
-        throw new Error("Wrong contribution. this contribution is not based on the previus hash");
+        throw new Error("Wrong contribution. This contribution is not based on the previous hash");
 
     const hasherResponse = new Blake2b(64);
     hasherResponse.update(contributionPreviousHash);