I can ping remote computers but script is failing with RPC error.

Hi,
I am getting the following error but my computers are reachable and remote powershell is enabled.
Could you please let me know why I am not able to run it on remote computers.
Is my script ok?

gwmi : The RPC server is unavailable. (Exception from HRESULT: 0x800706BA)
At C:\cfscripts2\Set-ADMSserviceLogonAccountServers.ps1:61 char:7
+ $svcD=gwmi win32_service -computername $ServerN -filter "name like '% ...
+       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [Get-WmiObject], COMException
    + FullyQualifiedErrorId : GetWMICOMException,Microsoft.PowerShell.Commands.GetWmiObjectCommand






#Agustín Mántaras December 2014.
#This code was downloaded from MSDN Code Gallery
#You can visit my blog post http://blogs.msdn.com/b/amantaras/archive/2014/12/10/powershell-script-to-change-windows-service-credentials.aspx

[CmdletBinding()]

$UserName = "testtarget\serviceaccount"
$Password = "P@ssword"
$Service = "servicename"
$ServerN = "w03,w02,w01"

  [Parameter(Mandatory=$True,Position=5)][int]$SecondsToWait

function PowerShell-PrintErrorCodes ($strReturnCode)
{
#This function will print the right value. The error code list was extracted using the MSDN documentation for the change method as December 2014
Switch ($strReturnCode)
    {
    0{ write-host  "    0 The request was accepted." -foregroundcolor "white" -BackgroundColor "Red" }
    1{ write-host  "    1 The request is not supported." -foregroundcolor "white" -BackgroundColor "Red" }
    2{ write-host  "    2 The user did not have the necessary access."-foregroundcolor "white" -BackgroundColor "Red"}
    3{ write-host  "    3 The service cannot be stopped because other services that are running are dependent on it." -foregroundcolor "white" -BackgroundColor "Red"}
    4{ write-host  "    4 he requested control code is not valid, or it is unacceptable to the service." -foregroundcolor "white" -BackgroundColor "Red"}
    5{ write-host  "    5 The requested control code cannot be sent to the service because the state of the service (Win32_BaseService State property) is equal to 0, 1, or 2." -foregroundcolor "white" -BackgroundColor "Red"}
    6{ write-host  "    6 The service has not been started." -foregroundcolor "white" -BackgroundColor "Red"}
    7{ write-host  "    7 The service did not respond to the start request in a timely fashion." -foregroundcolor "white" -BackgroundColor "Red"}
    8{ write-host  "    8 Unknown failure when starting the service."-foregroundcolor "white" -BackgroundColor "Red" }
    9{ write-host  "    9 The directory path to the service executable file was not found." -foregroundcolor "white" -BackgroundColor "Red"}
    10{ write-host  "    10 The service is already running."-foregroundcolor "white" -BackgroundColor "Red" }
    11{ write-host  "    11 The database to add a new service is locked."-foregroundcolor "white" -BackgroundColor "Red" }
    12{ write-host  "    12 A dependency this service relies on has been removed from the system."-foregroundcolor "white" -BackgroundColor "Red" }
    13{ write-host  "    13 The service failed to find the service needed from a dependent service."-foregroundcolor "white" -BackgroundColor "Red" }
    14{ write-host  "    14 The service has been disabled from the system."-foregroundcolor "white" -BackgroundColor "Red" }
    15{ write-host  "    15 The service does not have the correct authentication to run on the system."-foregroundcolor "white" -BackgroundColor "Red" }
    16{ write-host  "    16 This service is being removed from the system."-foregroundcolor "white" -BackgroundColor "Red" }
    17{ write-host  "    17 The service has no execution thread." -foregroundcolor "white" -BackgroundColor "Red"}
    18{ write-host  "    18 The service has circular dependencies when it starts."-foregroundcolor "white" -BackgroundColor "Red" }
    19{ write-host  "    19 A service is running under the same name."-foregroundcolor "white" -BackgroundColor "Red" }
    20{ write-host  "    20 The service name has invalid characters."-foregroundcolor "white" -BackgroundColor "Red" }
    21{ write-host  "    21 Invalid parameters have been passed to the service."-foregroundcolor "white" -BackgroundColor "Red" }
    22{ write-host  "    22 The account under which this service runs is either invalid or lacks the permissions to run the service."-foregroundcolor "white" -BackgroundColor "Red" }
    23{ write-host  "    23 The service exists in the database of services available from the system."-foregroundcolor "white" -BackgroundColor "Red" }
    24{ write-host  "    24 The service is currently paused in the system."-foregroundcolor "white" -BackgroundColor "Red" }
    }
}



function PowerShell-Wait($seconds)
{
#This function will cause the script to wait n seconds
   [System.Threading.Thread]::Sleep($seconds*1000)
}


function main()
{

#The main code. This function is called at the end of the script, in line 138
$svcD=gwmi win32_service -computername $ServerN -filter "name like '%$Service%'"
write-host "----------------------------------------------------------------"  
write-host "REMEMBER TO RUN THE SCRIPT AS ADMINISTRATOR"  -foregroundcolor "RED" -backgroundcolor "yellow"


write-host "Services found:"  $svcD.Count -foregroundcolor "green"
$svcD | ForEach-Object {

write-host "Service to change user and pasword: "   $_.name -foregroundcolor "green"

write-host "----------------------------------------------------------------"  


       if ($_.state -eq 'Running')
       {
         
           write-host "    Attempting to Stop de service..."
           $Value = $_.StopService()
            if ($Value.ReturnValue -eq '0')

               {
                $Change = 1      
                $Starts = 1      
                write-host "    Service stopped" -foregroundcolor "white" -BackgroundColor "darkgreen"
                }
               Else
               {
                    write-host "    The stop action returned the following error: " -foregroundcolor "white" -BackgroundColor "Red"
                    PowerShell-PrintErrorCodes ($Value.ReturnValue)
                     $Change = 0
                     $Starts = 0
                }
       }
       Else
       {
         write-host "    As the service is not running before, is not going to be started after the change." -foregroundcolor "RED" -backgroundcolor "yellow"
         $Starts = 0
         $Change = 1
       
       }
       
           if ($Change -eq 1 )
           {
             write-host "    Attemtping to change the service..."
               #this is the method that will do the user and pasword change
               $Value = $_.change($null,$null,$null,$null,$null,$null,$UserName,$Password,$null,$null,$null)
               if ($Value.ReturnValue -eq '0')
                {
                   write-host "    Pasword and user changed" -foregroundcolor "white" -BackgroundColor "darkgreen"
                   if ($Starts -eq 1)
                        {
                            write-host "    Attemtping to start the service, waiting $SecondsToWait seconds..."
                            PowerShell-Wait ($SecondsToWait)
                            $Value =  $_.StartService()
                            if ($Value.ReturnValue -eq '0')
                                {
                                    write-host "    Service started sucsesfully" -foregroundcolor "white" -BackgroundColor "darkgreen"
                                }
                             Else
                                {
                                write-host "    Error while starting the service: " -foregroundcolor "white" -BackgroundColor "red"
                                 PowerShell-PrintErrorCodes ($Value.ReturnValue)
                                }
                        }                                                          
                    }
                Else
                 {
                 write-host "    The change action returned the following error: "  -foregroundcolor "white" -BackgroundColor "red"
                  PowerShell-PrintErrorCodes ($Value.ReturnValue)
                 }
                }                      

   write-host "----------------------------------------------------------------"    
}

write-host "PROCESS COMPLETED"  -foregroundcolor "RED" -backgroundcolor "yellow"

}

clear  #clearing  the screen

main   #Calling the main function that will do the job.
creative555Asked:
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MacleanSystem EngineerCommented:
Try to telnet to one of the IP's with the RPC ports you are trying to reach, see if it is allowed.

RPC EPM:                            TCP 135
RPC over HTTPS:                TCP 593
SMB (for named pipes):    TCP 445

If not accessible, check firewall allows ports (Or temporarily disable firewall, then add rules when confirmed this was the issue)
If Firewall is ok, check that the RPC service is running on your computers.
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creative555Author Commented:
are those ports used by powershell to update remote servers? I am also getting this error "RPC server not available" for another script even though I can ping it .


I used PortQuery tool

TCP port 135 (epmap service): LISTENING

IP address resolved to Server02

querying...

TCP port 593 (http-rpc-epmap service): FILTERED
portqry.exe -n 10.202.10.41 -e 593 -p TCP exits with return code 0x00000002.


IP address resolved to server02

querying...

TCP port 445 (microsoft-ds service): LISTENING
portqry.exe -n 10.202.10.41 -e 445 -p TCP exits with return code 0x00000000.
0
creative555Author Commented:
thank you very much! Ports were closed
0
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