diff --git a/remix-lib/src/execution/txFormat.js b/remix-lib/src/execution/txFormat.js
index b462700866..64729b606f 100644
--- a/remix-lib/src/execution/txFormat.js
+++ b/remix-lib/src/execution/txFormat.js
@@ -169,7 +169,7 @@ module.exports = {
   * @param {Function} callbackDeployLibrary  - callbackDeployLibrary
   */
   buildData: function (contractName, contract, contracts, isConstructor, funAbi, params, callback, callbackStep, callbackDeployLibrary) {
-    var funArgs = ''
+    var funArgs = []
     var data = ''
     var dataHex = ''
 
@@ -179,9 +179,9 @@ module.exports = {
       data = Buffer.from(dataHex, 'hex')
     } else {
       try {
-        params = params.replace(/(^|,\s+|,)(\d+)(\s+,|,|$)/g, '$1"$2"$3') // replace non quoted number by quoted number
-        params = params.replace(/(^|,\s+|,)(0[xX][0-9a-fA-F]+)(\s+,|,|$)/g, '$1"$2"$3') // replace non quoted hex string by quoted hex string
-        funArgs = JSON.parse('[' + params + ']')
+        if (params.length > 0) {
+          funArgs = this.parseFunctionParams(params)
+        }
       } catch (e) {
         callback('Error encoding arguments: ' + e)
         return
@@ -384,6 +384,40 @@ module.exports = {
       }
     }
     return {}
+  },
+
+  parseFunctionParams: function (params) {
+    let args = []
+    // Segregate params textbox string with respect to comma (,)
+    params = params.split(',')
+    for (let i = 0; i < params.length; i++) {
+      let param = params[i].trim()
+      // Check if param starts with " , it may be string, address etc.
+      if (param.charAt(0) === '"') {
+        // Check if param completes in one location by looking for end quote (case: address data type)
+        if (param.charAt(param.length - 1) === '"') {
+          args.push(param.slice(1, param.length - 1))
+        } else {
+          let lastIndex = false
+          let paramStr = param.slice(1, param.length)
+          // For a paramter got divided in multiple location(case: string data type containing comma(,))
+          for (let j = i + 1; !lastIndex; j++) {
+            // Check if end quote is reached
+            if (params[j].charAt(params[j].length - 1) === '"') {
+              paramStr += ',' + params[j].slice(0, params[j].length - 1)
+              i = j
+              args.push(paramStr)
+              lastIndex = true
+            } else {
+              paramStr += ',' + params[j]
+            }
+          }
+        }
+      } else {
+        args.push(param)
+      }
+    }
+    return args
   }
 }
 
diff --git a/remix-lib/test/txFormat.js b/remix-lib/test/txFormat.js
index b75b9acab4..12acc81443 100644
--- a/remix-lib/test/txFormat.js
+++ b/remix-lib/test/txFormat.js
@@ -46,6 +46,35 @@ function testWithInput (st, params, expected) {
   }, () => {}, () => {})
 }
 
+
+tape('ContractStringParameters - (TxFormat.buildData) - format string input parameters', function (t) {
+  var output = compiler.compile(compilerInput(stringContract))
+  output = JSON.parse(output)
+  console.log('-----------------------------', output)
+  var contract = output.contracts['test.sol']['stringContractTest']
+  context = { output, contract }
+
+  t.test('(TxFormat.buildData)', function (st) {
+    st.plan(3)
+    testWithStringInput(st, '"1,2,3,4qwerty,5", 0xf7a10e525d4b168f45f74db1b61f63d3e7619ea8, "1,a,5,34"', '0000000000000000000000000000000000000000000000000000000000000060000000000000000000000000f7a10e525d4b168f45f74db1b61f63d3e7619ea800000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000000f312c322c332c347177657274792c3500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008312c612c352c3334000000000000000000000000000000000000000000000000')
+    testWithStringInput(st, '"1,2,3,4qwerty,5", "0xf7a10e525d4b168f45f74db1b61f63d3e7619ea8", "1,a,5,34"', '0000000000000000000000000000000000000000000000000000000000000060000000000000000000000000f7a10e525d4b168f45f74db1b61f63d3e7619ea800000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000000000000f312c322c332c347177657274792c3500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008312c612c352c3334000000000000000000000000000000000000000000000000')
+    // string with space
+    testWithStringInput(st, '"1,2,3,,4qw  erty,5", "0xf7a10e525d4b168f45f74db1b61f63d3e7619ea8", "abcdefghijkl"', '0000000000000000000000000000000000000000000000000000000000000060000000000000000000000000f7a10e525d4b168f45f74db1b61f63d3e7619ea800000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000012312c322c332c2c3471772020657274792c350000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000c6162636465666768696a6b6c0000000000000000000000000000000000000000')
+  })
+})
+
+function testWithStringInput (st, params, expected) {
+  txFormat.buildData('stringContractTest', context.contract, context.output.contracts, true, context.contract.abi[0], params, (error, data) => {
+    if (error) { return st.fails(error) }
+    console.log(data)
+    if (!data.dataHex.endsWith(expected)) {
+      st.fail(`result of buildData ${data.dataHex} should end with ${expected} . `)
+    } else {
+      st.pass(`testWithStringInput. result of buildData ${data.dataHex} ends with correct data`)
+    }
+  }, () => {}, () => {})
+}
+
 /* tape *********************************************************** */
 
 tape('ContractParameters - (TxFormat.buildData) - link Libraries', function (t) {
@@ -236,6 +265,15 @@ var uintContract = `contract uintContractTest {
     }
 }`
 
+var stringContract = `contract stringContractTest {
+  string _tp;
+  address _ap;
+  function test(string memory _t, address _a, string memory _i) public {
+      _tp = _t;
+      _ap = _a;
+  }
+}`
+
 var deploySimpleLib = `pragma solidity ^0.5.0;
 
 library lib1 {
diff --git a/remix-analyzer/tasks.todo b/tasks.todo
similarity index 100%
rename from remix-analyzer/tasks.todo
rename to tasks.todo