File too large warning on Windows

[riknoll]

When copying a UF2 file generated by PXT onto the circuit playground, I get this error:

The file does get flashed correctly despite the error.

[mmoskal]

I've never seen it. How much free space does it report? Or maybe it's the file name?

[riknoll]

Weird, it reports the drive as having 3.37 MB available. I tried a file with a shorter filename ("c.uf2") and I get the same warning.

[jamesadevine]

From work with ARMs' daplink, this message can appear incorrectly when there is actually an error with the USB transaction, for example not responding to a particular packet. The version we're using here in Lancaster, ejects too quickly and Win 10 complains a lot of the time. This could perhaps be a symptom of the same problem. Richard, is this the case with all files you try to flash to the device? It may be worth running wiresharks' USB pcap (https://wiki.wireshark.org/CaptureSetup/USB) to capture the transaction. James. On 12 Jan 2017, at 00:33, Richard Knoll <notifications@github.com<mailto:notifications@github.com>> wrote: Weird, it reports the drive as having 3.37 MB available. I tried a file with a shorter filename ("c.uf2") and I get the same warning. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub<#11 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AEheKeVcECtgbON78IfSVjIjqx3uTZDnks5rRXS5gaJpZM4LhFd2>.

[finneyj]

Yes, I almost always get this from a command line copy op:

C:\git\ccplay\codal-blinky [master +4 ~0 -1 !]> cp .\flash.uf2 d:\
cp : Could not find file 'd:\flash.uf2'.
At line:1 char:1
+ cp .\flash.uf2 d:\
+ ~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [Copy-Item], FileNotFoundException
    + FullyQualifiedErrorId : System.IO.FileNotFoundException,Microsoft.PowerShell.Commands.CopyItemCommand

C:\git\ccplay\codal-blinky [master +4 ~0 -1 !]>

Doesn't cause any issues, but is perhaps symptomatic.

[mmoskal]

This should be fixed in 1.9.0 drop. https://github.com/Microsoft/uf2-samd21/releases/download/v1.9.0/uf2-samd21-1.9.0.zip

thank you @jamesadevine - a little delay fixed it!

[huisheng-super]

Why do I have to upload the firmware again every time I connect to the computer?