I'm currently experiencing an issue trying to copy large (>100Mb) files to VMs using Copy-VMGuestFile; it seems that it will consistently fail after 1 minute and 45 seconds of transfer time (give or take a couple of seconds) with an error of:
The request was aborted: The request was canceled
I've tried different files and different VMs, but it always seems to fail after ~1:45
Windows 7 x64 client copying to a Server 2008 R2 guest.
Normally I'd just find another way to transfer the files, but these guests are on an isolated network with limited physical access, so a direct copy like this is by far the easiest way to do it.
I know this is a very old post however this issue is caused by a Timeout of WebOperationTimeoutSeconds which is set in the PowerCLIConfiguration configuration. In order to resolve you can set the value to infinite by executing Set-PowerCLIConfiguration -WebOperationTimeoutSeconds -1 as an Administrator, restart PowerCLI and then rerun the cmdlet and it should succeed.