Windows Error Fix: WinRS Client Function Parameter Error

Description

This error occurs when the Windows Remote Management (WinRM) or Windows Remote Shell (WinRS) client fails to process a remote command execution request. Specifically, the message The parameter required for the WinrsFreeRunCommandResult function is null or zero indicates a memory, configuration, or communication mismatch between the client and the remote server. It typically points to corrupted system variables, memory allocation issues within the WinRM service limits, or incompatible updates/configurations between the local computer and the remote machine.

Step-by-Step Fixes

Fix 1: Restart the WinRM Service

A corrupted session or temporary glitch in the Windows Remote Management service can cause this memory tracking error. Restarting the service forces Windows to clear these session parameters.

1. Press the Windows Key + R to open the Run dialog box.
2. Type services.msc and press Enter.
3. Scroll down the list to find Windows Remote Management (WS-Management).
4. Right-click on it and select Restart (or Start if it is not running).
5. Open your command line tool and try running the WinRS command again to check if the error is resolved.

Fix 2: Increase MaxMemoryPerShellMB Allocation

If the remote shell process demands more memory than the default configuration allows, parameters inside the internal WinrsFreeRunCommandResult function can fail or return null values.

1. Press the Windows Key, type cmd, right-click on Command Prompt, and select Run as administrator.
2. Run the following command to check your current WinRM configuration limits:

   winrm get winrm/config/winrs

3. Look at the MaxMemoryPerShellMB value. If it is low (like 150MB or 512MB), increase it to 2048MB by running this command:

   winrm set winrm/config/winrs @{MaxMemoryPerShellMB="2048"}

4. Perform the same step on both the local client computer and the target remote server if necessary, then test your remote connection.

Fix 3: Run SFC and DISM Repairs

System file corruption can damage the underlying DLL files responsible for WinRS client functions. Standard Windows deployment tools can repair these files automatically.

1. Open Command Prompt as an administrator.
2. Type the following command to check the deployment image health and press Enter:

   DISM.exe /Online /Cleanup-image /Restorehealth

3. Allow the process to reach 100% completion.
4. Type the system file checker command and press Enter:

   sfc /scannow

5. Restart your computer after the scans finish and try running your remote commands again.

Fix 4: Reset the WinRM Configuration to Default

If configuration settings or security descriptors for the WinRM service have become corrupted, resetting the entire service framework will clear the problem.

1. Open Command Prompt as an administrator.
2. Execute the configuration reset command:

   winrm quickconfig

3. If prompted to make changes, type y and press Enter to allow the tool to repair listeners and firewall exceptions.
4. Re-configure any specific custom ports or authentication mechanisms you previously used.