Hey. My team always gets this error with the subnet mask. If you wanna send a screenshot, that would be greaaaat. IDK why this happens, but it really isnt a big deal.
First ping the crio with
ping --IP address of your crio-- (an example would be
ping 10.26.07.2) and make sure you have a good connection
Then do as follows:
open up command prompt
type
ren C:\Users\--InsertYourUserNameHere--\Documents\NetBeansProjects\--InsertYourProjectNameHere--\suite\image.suite robot.suite
type
ftp --IP of the crio-- (Example would be ftp 10.26.07.2)
type
cd ni-rt
type
cd system
type
send C:\Users\--InsertYourUserNAmeHere--\Documents\NetBeansProjects\--InsertYourProjectNameHere--\suite\robot.suite
Reboot the crio
What you just did was exactly what NetBeans wanted to do, just you did it manually. You ftp-ed into the crio and manually replaced the code and rebooted. You have sucessfully uploaded code
the right way 
yourself!
I was gonna write a batch file for you, but this is just quicker