Publish failed due to Unable to copy file

Describe the bug

i’m trying to publish a webjob to Azure but I get some errors like the following. looks like it’s because in the path after ‘Out’ it adds two backslashes instead of one (PubTmp\Out\\app_data).

28>Could not copy "C:\Development\TNG\ActivationService\bin\Release\netcoreapp3.1\TNG.Services.WindowsService.ActivationService.runtimeconfig.json" to "C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\TNG.Services.WindowsService.ActivationService.runtimeconfig.json". Beginning retry 1 in 1000ms. Could not find a part of the path 'C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\TNG.Services.WindowsService.ActivationService.runtimeconfig.json'. 
28>Could not copy "C:\Users\mohsen.rezaei\.nuget\packages\microsoft.extensions.configuration.azureappconfiguration\4.0.0\lib\netstandard2.0\Microsoft.Extensions.Configuration.AzureAppConfiguration.dll" to "C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\Microsoft.Extensions.Configuration.AzureAppConfiguration.dll". Beginning retry 1 in 1000ms. Could not find a part of the path 'C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\Microsoft.Extensions.Configuration.AzureAppConfiguration.dll'. 
28>Could not copy "C:\Users\mohsen.rezaei\.nuget\packages\microsoft.extensions.configuration.environmentvariables\3.1.6\lib\netcoreapp3.1\Microsoft.Extensions.Configuration.EnvironmentVariables.dll" to "C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\Microsoft.Extensions.Configuration.EnvironmentVariables.dll". Beginning retry 1 in 1000ms. Could not find a part of the path 'C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\Microsoft.Extensions.Configuration.EnvironmentVariables.dll'. 
28>Could not copy "C:\Users\mohsen.rezaei\.nuget\packages\microsoft.extensions.dependencyinjection.abstractions\3.1.6\lib\netstandard2.0\Microsoft.Extensions.DependencyInjection.Abstractions.dll" to "C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\Microsoft.Extensions.DependencyInjection.Abstractions.dll". Beginning retry 1 in 1000ms. Could not find a part of the path 'C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\Microsoft.Extensions.DependencyInjection.Abstractions.dll'. 
28>Could not copy "C:\Users\mohsen.rezaei\.nuget\packages\microsoft.extensions.options.configurationextensions\3.1.6\lib\netcoreapp3.1\Microsoft.Extensions.Options.ConfigurationExtensions.dll" to "C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\Microsoft.Extensions.Options.ConfigurationExtensions.dll". Beginning retry 1 in 1000ms. Could not find a part of the path 'C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\Microsoft.Extensions.Options.ConfigurationExtensions.dll'. 
28>Could not copy "C:\Users\mohsen.rezaei\.nuget\packages\system.data.sqlclient\4.8.1\runtimes\unix\lib\netcoreapp2.1\System.Data.SqlClient.dll" to "C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\runtimes\unix\lib\netcoreapp2.1\System.Data.SqlClient.dll". Beginning retry 1 in 1000ms. Could not find a part of the path 'C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\runtimes\unix\lib\netcoreapp2.1\System.Data.SqlClient.dll'. 
28>Could not copy "C:\Development\TNG\ActivationService\bin\Release\netcoreapp3.1\TNG.Services.WindowsService.ActivationService.runtimeconfig.json" to "C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\TNG.Services.WindowsService.ActivationService.runtimeconfig.json". Beginning retry 2 in 1000ms. Could not find a part of the path 'C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\TNG.Services.WindowsService.ActivationService.runtimeconfig.json'. 
28>Could not copy "C:\Users\mohsen.rezaei\.nuget\packages\microsoft.extensions.configuration.azureappconfiguration\4.0.0\lib\netstandard2.0\Microsoft.Extensions.Configuration.AzureAppConfiguration.dll" to "C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\Microsoft.Extensions.Configuration.AzureAppConfiguration.dll". Beginning retry 2 in 1000ms. Could not find a part of the path 'C:\Development\TNG\ActivationService\obj\Release\netcoreapp3.1\PubTmp\Out\\app_data\Jobs\Continuous\TNG.Services.WindowsService.ActivationService\Microsoft.Extensions.Configuration.AzureAppConfiguration.dll'. 

Further technical details

I’m using ASP.Net Core 3.1 and visual studio 2019

[Stricnis]

@kylemcnee I had the same issue but fixed it thanks to @joeloff comment. You can add these 2 lines to your publish profile to use different (shorter) paths during the publish: <PublishIntermediateTempPath>D:\Temp\VS2019\MyWebJob\Tmp\</PublishIntermediateTempPath> <PublishIntermediateOutputPath>D:\Temp\VS2019\MyWebJob\Out\</PublishIntermediateOutputPath> Hope this helps.

[kylemcnee]

This has been blocking my work for over a year at this point. If you’re reading this, be warned! Do anything you possibly can to avoid working with .NET