@t3p3tony
Hi
I copied my set of g-code files over to a Thinkpad.
There were a set of 20 g-code files of various sizes from a few KB to 33 MB
I had ONE failure , the same one I have been seeing on my workstation PC (Dell T7500). It happened at my first attempt to upload to the Duet from the ThinkPad.

After that, I had 19 successful uploads

So then I went back to the workstation and decided to copy the g-code file set from Hard Drive F onto Drive C, a solid state drive.

Using a Chrome browser, I was now able to upload the file set with no more errors, they were gone.

I then used Firefox which also had previously failed and again the files uploaded with no problem.

Finally, I went back to loading from Drive F and using both Chrome and Firefox I was successful in loading all the files without error.

The problem seems to have sorted itself out overnight. I did nothing to solve the problem other than what I have outlined above.

Magically, I can now use Chrome or Firefox to upload to the Duet, go figure. I hope it stays fixed.

FM as they used to say in Customer Support

@veti Hi, it looks like the my topic is getting slightly hijacked. But yes, I have a laptop I can use and I will try that.

@t3p3tony
The problem seems to be with Firefox too.
I tried removing Chrome from my PC with Revo Uninstaller which does a thorough job of cleaning up any leftovers the normal uninstall leaves behind.
Then I did a fresh install of Chrome but the problem remains.
I guess it has to be some weirdness about my system if others aren't having the problem.

@t3p3tony
I was using the ipaddress to access the DWC. My machine name was a bit unwieldly and might have had illegal characters in it so I have never tried accessing the DWC that way. I will change the machine name in config.g and try machinename.local.

Also, no proxy servers are involved.

@t3p3tony Hi,
well, (sadly) they don't work where I live.

Firmware Version:
2.03 (2019-06-13b2)

Web Interface Version:
1.22.6

My Duet wifi controller will not upload g-code files when the browser used is either Chrome or Firefox.
The error reported is "network error"
If I use Microsoft Edge, files upload reliably every time without error.
I can also FTP files to the duet.
Any help will be much appreciated as Edge is not my favorite browser.