- Make sure that you have following box checked under your file-uploading HTTP Sampler: "Use multipart/form-data for POST"
- Make sure that your "File Path" bit has correct path to your 40connection.csv file
JMeter uses FileServer class to work with filesystem items. You can use a
Beanshell Sampler with following code
log.info("MY BASE DIR = " + FileServer.getFileServer().getBaseDir());
To determine current directory JMeter looks files in.
Look into your jmeter.log file for a line containing "MY BASE DIR" in my case it's
2013/12/04 16:37:21 INFO - jmeter.util.BeanShellTestElement: MY BASE DIR = /home/glinius/Applications/jmeter/extras