Installation error for "RPC server": Nintex Workflow

Symptom

During installation of Nintex External Connection Components and Nintex Workflow on a multi-server farm the following error message appears:

"The RPC server is unavailable"

This message may indicate upgrade or installation issues on one or more servers in the farm for one or more of the following services:

Nintex Connector Workflow Queue Service Recycle

Nintex Workflow Start Service

Cause

Possible causes for this error include firewall and security restrictions for affected servers.

Resolution

Manually install or upgrade the Nintex connector Workflow Queue Service and Nintex Workflow Start Service on each server in the farm using the following procedure.

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

   $path =

   [Microsoft.SharePoint.Utilities.SPUtility]::GetVersionedGenericSetupPath("bin\NintexWorkflow\Nintex.Workflow.Connector.QueueService.exe", 15)

   $serviceName = "Nintex Connector 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("bin\NintexWorkflowStart\Nintex.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.

4. 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 Connector Workflow Queue Service.

   5. Click Start for Nintex Workflow Start Service.