title: Chaincode Argument Error while working with minifab implementation
body: <p>I am trying to run fabric network locally using minifab tutorial. While making my first transaction, I am encountering following error.</p>
  <p>Here is my command</p>
  <pre><code>minifab invoke -p '&quot;invoke&quot;,&quot;a&quot;,&quot;b&quot;,&quot;4&quot;'
  </code></pre>
  <p>Error Details</p>
  <pre><code>non-zero return code
    Error: chaincode argument error: invalid character 'i' looking for beginning of value
    Usage:
      peer chaincode invoke [flags] 
  </code></pre>