Workflow Installer Returns Message Stating That The RPC Server is Unavailable

Issue

When running the installer for Nintex Workflow, the installer may state:

The RPC server is unavailable.

Resolution

Manually install or upgrade the Nintex LiveWorkflow Queue Service and Nintex Workflow Start Service on each server in the farm.

1. In SharePoint Management Shell, run the following script for the Nintex Live Workflow Queue Service:

   $path =[Microsoft.SharePoint.Utilities.SPUtility]::GetVersionedGenericSetupPath("binNintexWorkflowNintex.Workflow.Live.QueueService.exe", 15)$serviceName = "Nintex Live Workflow Queue Service"New-Service -Name $serviceName -DisplayName $serviceName -BinaryPathName $path

2. ​In SharePoint Management Shell, run the following script for the Nintex Workflow Start Service:

   $path =[Microsoft.SharePoint.Utilities.SPUtility]::GetVersionedGenericSetupPath("binNintexWorkflowStartNintex.Workflow.Start.Service.exe", 15)$serviceName = "Nintex Workflow Start Service"New-Service -Name $serviceName -DisplayName $serviceName -BinaryPathName $path

3. Run the IISReset command and restart the SharePoint Timer Service.

To start the service on the current server, do the following:

1. On the Central Administration Home page, click Application Management.
2. In the Service Applications section, click Manage services on server.
3. On the Services on Server page, select the desired server.
4. Click Start for Nintex Live Workflow Queue Service.
5. Click Start for Nintex Workflow Start Service.

Additional Information

When the installer is complete, read the messages leading up to the 'The RPC server is unavailable' message to determine the context. In some cases when a Nintex Workflow Installer needs to uninstall a deprecated Nintex service, will attempt to remove the service from all servers in the SharePoint environment. This error may appear when the installer attempts to remove a service that is non-existent on a server. In this case, the error presented in the installer should not be of any concern.

If you see that the Nintex Live Workflow Queue Service and Nintex Workflow Start Service is missing from some servers in the SharePoint environment, note that only one server is required. Any additional servers running these services are redundant. This redundancy is acceptable, but is not required.

Related Links

Installation error for "RPC server": Nintex Workflow

https://help.nintex.com/en-US/nintex2013/installation/InstallGuide/TRB-rpc-server-install-error.htm