Hi, I've had a data flow that is connected to a Sharepoint csv for months without issue and now I'm getting the following error when refreshing the data: "SharePoint: Request failed: The underlying connection was closed: An unexpected error occurred on a send." I've tried clearing the permissions and reconnected but end up with the same error. I've also tried uninstalling and reinstalling Power Bi desktop. The file is not large (5 mb) and I am able to navigate my SharePoint library from within Power Bi. [EDIT] Upon further investigation, I found that it succesfully located my CSV file on SharePoint but then fails when retrieving the binary content with a slightly different error message: "DataSource.Error: The underlying connection was closed: An unexpected error occurred on a send." [EDIT 2.0] I have managed to extract a more detailed error message: Unexpected error: The underlying connection was closed: An unexpected error occurred on a send. Details: Microsoft.Mashup.Evaluator.Interface.ErrorException: The underlying connection was closed: An unexpected error occurred on a send. ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: The underlying connection was closed: An unexpected error occurred on a send. ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: The underlying connection was closed: An unexpected error occurred on a send. ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: The underlying connection was closed: An unexpected error occurred on a send. ---> Microsoft.Mashup.Evaluator.Interface.ErrorException: The underlying connection was closed: An unexpected error occurred on a send. ---> Microsoft.Mashup.Engine1.Library.Http.ResponseException: The underlying connection was closed: An unexpected error occurred on a send. ---> Microsoft.Mashup.Engine1.Library.Http.ResponseException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) --- End of inner exception stack trace --- at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count) at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest) at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest, Boolean renegotiation) at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size) at System.Net.ConnectStream.WriteHeaders(Boolean async) --- End of inner exception stack trace ---
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