Exception: Internal Error

[IpsitaMahapatra]

I am facing an exception while debugging my code saying:  Internal : Failed To perform Step 1 In Write Stage 'Name' on page 'Action 1' - Exception has been thrown by the target of an invocation. Please help me out with this.    

[JukkaSalovaara]

What kind of element is First_Name?

[SunilSinghal]

I am able to read the property and click on Text element but not able to write into it using Write Stage and facing the below error (Member Not found) while execution: Error : ""Failed to perform step 1 in Write Stage 'Writer1' on page 'Action 1' - Member not found. (Exception from HRESULT: 0x80020003 (DISP_E_MEMBERNOTFOUND))