This user is allowed a maximum number of 5 concurrent shells, which has been exceeded.

Question

I have a C# component which executes Powershell scripts in powershell environment. Suddenly it started to show some issues, Now, when I try to execute the following, it shows exception
    Enter-PSSession -ComputerName 192.21.10.71 -Credential abc\admin
The exception is given below...
    Enter-PSSession : Connecting to remote server failed with the following error message : 
    The WS-Management service cannot process the request. **This user is allowed a maximum 
    number of 5 concurrent shells, which has been exceeded.** Close existing shells or raise 
    the quota for this user. For more information, see the about_Remote_Troubleshooting 
    Help topic.
    At line:1 char:16
    + Enter-PSSession <<<<  -ComputerName 192.21.10.71 -Credential abc\admin
        + CategoryInfo          : InvalidArgument: (192.21.10.71:String) [Enter-PSSession], 
    PSRemotingTransportException
        + FullyQualifiedErrorId : CreateRemoteRunspaceFailed
I fear, this is because I haven't properly closed / disposed the runspaces created in c# component.
Here is the code extracted from my component
Collection<PSObject> objPS = new Collection<PSObject>();
    PowerShell powershell = PowerShell.Create();
PSCredential credential = new PSCredential(strUserName, password);
    objRunspace = RunspaceFactory.CreateRunspace();
objRunspace.Open();
objPS = powershell.Invoke();
finally 
                objRunspace.Dispose();
I am beating the bush, instead of finding the root cause of this issue.
Thanks...

Answer 1

Hi,
Even I am facing the same issue while trying to open session in my C# code. 
I have created and using one System.Management.Automation.Runspaces.Runspace object. Which is created by calling Open() method.
At the end while exiting the program I am calling Dispose() method.
Initially when I wrote this client, I was able to run powershell commands without any issue. After some days of use I got this below exception.
Result Message: Assembly Initialization method 
InitializeLyncTestSuite threw exception. System.Management.Automation.Remoting.PSRemotingTransportException: System.Management.Automation.Remoting.PSRemotingTransportException: Connecting to remote server failed with the following error message : The WS-Management
service cannot process the request. The maximum number of concurrent shells for this user has been exceeded. Close existing shells or raise the quota for this user. For more information, see the about_Remote_Troubleshooting Help topic.. Aborting test execution.
Result StackTrace:
at System.Management.Automation.Runspaces.AsyncResult.EndInvoke()
   at System.Management.Automation.Runspaces.Internal.RunspacePoolInternal.EndOpen(IAsyncResult asyncResult)
   at System.Management.Automation.Runspaces.Internal.RemoteRunspacePoolInternal.Open()
   at System.Management.Automation.Runspaces.RunspacePool.Open()
   at System.Management.Automation.RemoteRunspace.Open()
After restarting all the Lync Server services I was able to avoid this exception. But after using this client couple of times now, I am facing the same issue again.
Does calling Dispose() method is not enough for closing a session from C# code? Or should I use something else to close session from C# client?