diff --git a/cli.js b/cli.js
index 18e7cd9..350e132 100755
--- a/cli.js
+++ b/cli.js
@@ -61,6 +61,7 @@ compiler(fullFileName).then( (cir) => {
     process.exit(0);
 }, (err) => {
 //    console.log(err);
+    console.log(err.stack);
     if (err.pos) {
         console.error(`ERROR at ${err.errFile}:${err.pos.first_line},${err.pos.first_column}-${err.pos.last_line},${err.pos.last_column}   ${err.errStr}`);
     } else {
diff --git a/package-lock.json b/package-lock.json
index e2b6f99..2159543 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1469,9 +1469,9 @@
       }
     },
     "snarkjs": {
-      "version": "0.1.3",
-      "resolved": "https://registry.npmjs.org/snarkjs/-/snarkjs-0.1.3.tgz",
-      "integrity": "sha512-z5HhuNt019ZzNzUztETK31rpjRRSz3Uzy8TjGgSROf+9ZT9i6dbdWkjTC3fh5o9H+R/2+hcR+7IKAmpIR56V+A==",
+      "version": "0.1.5",
+      "resolved": "https://registry.npmjs.org/snarkjs/-/snarkjs-0.1.5.tgz",
+      "integrity": "sha512-4GiP60ONIitWRnC5+Gsl7nIO62fvkGN9Y9jsDWBKORZI34eNXJBrMjhCbT+0X57FS2XjY0MsR0/Qvg2cs1H0sQ==",
       "dev": true,
       "requires": {
         "big-integer": "^1.6.35",
@@ -1481,9 +1481,9 @@
       },
       "dependencies": {
         "ajv": {
-          "version": "6.5.4",
-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.5.4.tgz",
-          "integrity": "sha512-4Wyjt8+t6YszqaXnLDfMmG/8AlO5Zbcsy3ATHncCzjW/NoPzAId8AK6749Ybjmdt+kUY1gP60fCu46oDxPv/mg==",
+          "version": "6.5.5",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.5.5.tgz",
+          "integrity": "sha512-7q7gtRQDJSyuEHjuVgHoUa2VuemFiCMrfQc9Tc08XTAc4Zj/5U1buQJ0HU6i7fKjXU09SVgSmxa4sLvuvS8Iyg==",
           "dev": true,
           "requires": {
             "fast-deep-equal": "^2.0.1",
@@ -1514,9 +1514,9 @@
           }
         },
         "eslint": {
-          "version": "5.7.0",
-          "resolved": "https://registry.npmjs.org/eslint/-/eslint-5.7.0.tgz",
-          "integrity": "sha512-zYCeFQahsxffGl87U2aJ7DPyH8CbWgxBC213Y8+TCanhUTf2gEvfq3EKpHmEcozTLyPmGe9LZdMAwC/CpJBM5A==",
+          "version": "5.9.0",
+          "resolved": "https://registry.npmjs.org/eslint/-/eslint-5.9.0.tgz",
+          "integrity": "sha512-g4KWpPdqN0nth+goDNICNXGfJF7nNnepthp46CAlJoJtC5K/cLu3NgCM3AHu1CkJ5Hzt9V0Y0PBAO6Ay/gGb+w==",
           "dev": true,
           "requires": {
             "@babel/code-frame": "^7.0.0",
diff --git a/package.json b/package.json
index 9c8e587..2351a07 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,6 @@
     "eslint": "^5.0.1",
     "eslint-plugin-mocha": "^5.0.0",
     "jison": "^0.4.18",
-    "snarkjs": "0.1.5"
+    "snarkjs": "0.1.6"
   }
 }
diff --git a/src/exec.js b/src/exec.js
index cd5b9d3..01371f2 100644
--- a/src/exec.js
+++ b/src/exec.js
@@ -318,8 +318,7 @@ function execInstantiateComponet(ctx, vr, fn) {
         const v = exec(ctx, fn.params[i]);
         if (ctx.error) return;
 
-        if (v.type != "NUMBER") return error(ctx, fn.params[i], "expected a number");
-        paramValues.push( v.value);
+        paramValues.push(v);
     }
     if (template.params.length != paramValues.length) error(ctx, fn, "Invalid Number of parameters");
 
@@ -330,6 +329,15 @@ function execInstantiateComponet(ctx, vr, fn) {
     instantiateComponent(vv);
 
     function instantiateComponent(varVal) {
+
+        function extractValue(v) {
+            if (Array.isArray(v)) {
+                return v.map(extractValue);
+            } else {
+                return v.value.toString();
+            }
+        }
+
         if (Array.isArray(varVal)) {
             for (let i =0; i<varVal.length; i++) {
                 instantiateComponent(varVal[i]);
@@ -355,11 +363,8 @@ function execInstantiateComponet(ctx, vr, fn) {
 
         const scope = {};
         for (let i=0; i< template.params.length; i++) {
-            scope[template.params[i]] = {
-                type: "NUMBER",
-                value: paramValues[i]
-            };
-            ctx.components[ctx.currentComponent].params[template.params[i]] = paramValues[i];
+            scope[template.params[i]] = paramValues[i];
+            ctx.components[ctx.currentComponent].params[template.params[i]] = extractValue(paramValues[i]);
         }
 
         ctx.components[ctx.currentComponent].template = templateName;