Windows Error: The WinRM Shell client cannot process the request

Description of the Error

This error occurs when a Windows Remote Management (WinRM) session fails to receive output data from a remote machine. The specific function WSMansReceiveShellOutput expects valid variables to process the stream of data. If a network disruption, buffer overflow, mismatch in data size, or corruption occurs during transmission, the required parameter becomes null or zero, causing the WinRM client to fail and abort the operation. It is commonly triggered during long-running scripts, heavy data transfers, or when there is an incompatibility in PowerShell/WinRM packet size configurations between the local and remote machines.

Step-by-Step Fixes

Follow these solutions step-by-step to resolve the issue. You must run these commands on both the client (your machine) and the server (remote machine) unless specified otherwise.

Solution 1: Increase WinRM MaxEnvelopeSizeKB

The most common cause is that the data being returned exceeds the default maximum packet size allowed by WinRM.

1. Click the Start menu, type cmd, right-click on Command Prompt, and select Run as administrator.
2. Check your current maximum envelope size by executing this command:

   winrm get winrm/config

3. Increase the envelope size on both the client and remote machines to allow larger data packets (e.g., changing it to 8192 KB):

   winrm set winrm/config @{MaxEnvelopeSizeKB="8192"}

4. Restart the WinRM service to apply changes:

   net stop winrm
   net start winrm

Solution 2: Increase WSMan Provider MaxMemoryPerShellMB

If the remote shell runs out of allocated memory while processing the output, the function parameters fail.

1. Open PowerShell as an Administrator.
2. Check the current memory limit per shell by running:

   Get-Item WSMan:\localhost\Shell\MaxMemoryPerShellMB

3. Increase the memory limit to 2048 MB (or higher depending on your system resources) to prevent out-of-memory states:

   Set-Item WSMan:\localhost\Shell\MaxMemoryPerShellMB 2048

4. Restart the WinRM service to commit the configuration:

   Restart-Service winrm

Solution 3: Modify the Output Buffer in Your PowerShell Script

If the error happens during a specific command or script, the output stream might be overwhelming the pipeline. You can force the command to process output in smaller batches or clear the buffer.

1. Open your script and locate the command causing the error.
2. Append | Out-Buffer -Count 1 to the command to force immediate processing of each data row instead of caching a large batch. Example:

   Get-WinEvent -LogName Application | Out-Buffer -Count 1

3. Alternatively, if you do not need the detailed output streams, redirect errors and verbose outputs to null:

   Your-Command-Here 2>\$null 3>null 4>null

Solution 4: Reset and Reconfigure WinRM Settings

If configuration parameters are corrupted, resetting the WinRM architecture back to defaults can fix hidden issues.

1. Open Command Prompt as an administrator.
2. Completely disable the WinRM listener configuration:

   winrm invoke ResetListener winrm/config/listener?Address=*+Transport=HTTP

3. Re-initialize the quick configuration wizard to repair endpoints and firewall rules:

   winrm quickconfig -q