Troubleshooting

These are errors and solutions that you may find during any tutorial. If your problem is not listed in this table, either contact niolabs support using the blue conversation bubble in the Portal or the System Designer or post your questions on the nio forum.

Error Possible cause Solution
Error Loading Instance
  • The instance is not running.

  • The instance is not reachable at the specified address (host) and port.
  • For nio-managed cloud instances:
  • Contact niolabs support.

  • For self-managed instances:
  • Click edit, verify hostname and port are correct.
  • Verify instance is running.
  • If instance will not stay running, locate project log files and contact niolabs support.
  • [ERROR][Service Name.Block Name].process_signals failed A conflict with block configuration, and/or signals received, has caused a failure and the signal is lost.
  • Verify incoming signals have all fields required by block configuration.
  • Check block expression syntax.
  • Compare block configuration against block documentation.
  • For a self-managed instance, check the local log files where more information about the specific failure is available.
  • Contact niolabs support with any questions.
  • Warning: Auto-start is set to true, but the service is stopped A service that should be running is not running.
  • Verify that autostart is set as desired.
  • If service will not start, view logger panel for errors.
  • Contact niolabs support with any questions.
  • Unable to Connect to Pubkeeper Server.
  • Pubkeeper server is not running.

  • Pubkeeper server is not reachable at the specified host.
  • For nio-managed cloud Pubkeeper server:
  • Contact niolabs support.

  • For self-managed Pubkeeper server:
  • Select system and click edit, verify hostname, port, and security settings.
  • Verify Pubkeeper server is running.
  • Unable to Save Block Unexpected token < in JSON There is an invalid block configuration where one or more entered fields are not able to be saved to the configuration file.
  • Check block configuration fields for typos.
  • Check block documentation.
  • Contact niolabs support with any questions.
  • Gold or Blue Starburst on block The block is not saved. Select the block and click Save on the toolbar.
    Logger Panel display is different than the tutorial
  • Incorrect block configuration.

  • Changes don't take effect until the service is restarted.
  • Double-check the configuration instructions for errors.
  • Save and restart your service.
  • Cannot view any blocks in the Block Library Block Library search box is not empty. Clear the contents of the search bar.
    Not receiving any messages in the logger panel and no error messages.
  • Signals are not being processed.

  • Service configuration has not been saved.

  • Service is not running.
  • Verify service configuration has been saved, then close and reopen service in the System Designer.
  • Verify the source of signals is producing signals: check the block configuration and all external services, systems, and devices.
  • Unable to start service. Block(s) have failed to configure and start.
  • See logger panel for accompanying errors describing blocks that have failed to configure.
  • Verify block configurations are correct and valid.
  • For a self-managed instance, check the local log files where more information about the specific failure is available.
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