Getting "Access to path .. is denied"

[tpetricek]

I'm trying to replace NuGet reference with Github references for the CSV parser in fslaborg/Deedle#288

When I run paket update after adding some new files, I quite often get the following error:

Locked version resolutions written to c:\Tomas\Public\Deedle\paket.lock
Downloading fsharp/FSharp.Data:d1e9a2735f64a05db97c7ed5fee382a4ebc6158e src/CommonRuntime/TextConversions.fs to c:\Tomas\Public\Deedle\paket-files\fsharp\FSharp.Data\src\CommonRuntime\TextConversions.fs
Downloading fsharp/FSharp.Data:d1e9a2735f64a05db97c7ed5fee382a4ebc6158e src/CommonRuntime/StructuralInference.fs to c:\Tomas\Public\Deedle\paket-files\fsharp\FSharp.Data\src\CommonRuntime\StructuralInference.fs
Downloading fsharp/FSharp.Data:d1e9a2735f64a05db97c7ed5fee382a4ebc6158e src/Csv/CsvRuntime.fs to c:\Tomas\Public\Deedle\paket-files\fsharp\FSharp.Data\src\Csv\CsvRuntime.fs
Downloading fsharp/FSharp.Data:d1e9a2735f64a05db97c7ed5fee382a4ebc6158e src/CommonRuntime/StructuralTypes.fs to c:\Tomas\Public\Deedle\paket-files\fsharp\FSharp.Data\src\CommonRuntime\StructuralTypes.fs
Downloading fsharp/FSharp.Data:d1e9a2735f64a05db97c7ed5fee382a4ebc6158e src/CommonRuntime/TextRuntime.fs to c:\Tomas\Public\Deedle\paket-files\fsharp\FSharp.Data\src\CommonRuntime\TextRuntime.fs

Paket failed with:
   Access to the path 'c:\Tomas\Public\Deedle\paket-files\fsharp\FSharp.Data\src\CommonRuntime' is denied.

Any idea what could be causing this? I don't have any crazy anti-virus and the folder is not on OneDrive or DropBox. The only thing that might fail is the internet connection (which isn't perfect here...)

[tpetricek]

For some reason, things work better when I add them by folder. I.e. first add:

github fsharp/FSharp.Data src/CommonRuntime/TextConversions.fs
github fsharp/FSharp.Data src/CommonRuntime/TextRuntime.fs
github fsharp/FSharp.Data src/CommonRuntime/StructuralTypes.fs
github fsharp/FSharp.Data src/CommonRuntime/StructuralInference.fs

Then run paket install and then add the rest:

github fsharp/FSharp.Data src/Csv/CsvRuntime.fs
github fsharp/FSharp.Data src/Csv/CsvFile.fs
github fsharp/FSharp.Data src/Csv/CsvInference.fs

[forki]

I hope #445 fixes it. If not, then please try -v mode. That should give us the stacktrace.

[mexx]

Problem is that we remove the folder on each file, and another download thread tries to write into it.
#445 (comment)