Vuscript cannot generate encrypt data

  • Hello All,

    I'm new for Loadrunner application. I have some problem to ask to you.

    1. In step create and generate vuscript, I can do it.

    2. In step reply I cannot reply mine script. The system show

    warning -26490:File name in a multipart submit is missing or empty.

    I found  step login to application (username-password) cannot generate in my typed.

    Example

    Username : test001  >> system gen my username  = ueuuyrueieieiuurr7uif

    Password:test111 >> system gen my password =7r77ru4hidiruyrurururhr

    I don't know what happen, Please advise to solve this problem.

    Thank You.