I have a problem with sending form with file through JavaScript using Jmeter. It simply does not succeeded. Unfortunately I do not have any logs from that situation.

But when I am sending form without file parameter through JavaScript using Jmeter it succeeded. Once I add parameter with a file it does not.

Tried to check option in Jmeter Use multipart/form-data for POST with file upload section filled but it does not help.

In test I am using HTTP Request sampler with:

• POST method
• multipart/form-data for POST box is checked
• In Files Upload section the following values are provided:
  File Path
  Parameter Name
  File MIME Type
• additional parameters are provided for form

==== EDIT ====

Before - not working

After changes - working