Failed to parse gateway core config file: Object reference not set to an instance of an object.

Tools for troubleshooting

Collecting logs from the gateway configurator

There are several logs you can collect for the gateway, and you should always start with the logs. The simplest way to collect logs after installing the gateway is through the user interface. In the On-premises data gateway user interface, select Diagnostics and then select the Export logslink near the bottom of the page, as shown in the following image.

Installer logs

%localappdata%\Temp\On-premises_data_gateway_*.log

Configuration logs

%localappdata%\Microsoft\On-premises Data Gateway\GatewayConfigurator*.log

On-premises data gateway service logs

C:\Users\PBIEgwService\AppData\Local\Microsoft\On-premises Data Gateway\Gateway*.log

Event Logs

The On-premises data gateway service event logs are present under Application and Services Logs.

Fiddler Trace

Fiddler is a free tool from Telerik that monitors HTTP traffic. You can see the back and forth with the Power BI service from the client machine. This may show errors and other related information.

Refresh History

When using the gateway for scheduled refresh, Refresh History can help you see what errors have occurred, as well as provide useful data if you should need to create a support request. You can view both scheduled, as well as on demand, refreshes. Here is how you can get to the Refresh History.

1. In the Power BI navigation pane, in Datasets, select a dataset > Open Menu > Schedule Refresh.

   

2. In Settings for... > Schedule Refresh, select Refresh History.