# Patch Management - Manual Scanning Failure

## Problem

You started a Manual Patch Scan but it failed. You find one of the errors in the Remarks column of the Scan System page.

1. The network path is not found  
2. Logon Failure : unknown username or password  
3. No Network Provider accepted the given Network Path  
4. Not enough storage is available to process this command  
5. The storage control block is invalid  
6. Scanning Timed Out  

## Cause

1. Endpoint Central Server is unable to communicate with the Endpoint Central Agent installed in the client machine.  
2. Absence of Agent in the client machine.  
3. The Firewall blocks data, Machine Running Endpoint Central has multiple IP Addresses or has Virtual Adapters.  

## Resolution

**Based on the Remarks you get, refer to the appropriate KBs given below:**

1. [The network path was not found](https://www.manageengine.com/products/desktop-central/agent_installation_failure_path.html)  
2. [Logon failure : unknown username or password](https://www.manageengine.com/products/desktop-central/agent_installation_logon_failure.html)  
3. [No Network provider accepted the given Network Path](https://www.manageengine.com/products/desktop-central/agent_installation_network_provider.html)  
4. [Not enough server storage is available to process this command](https://www.manageengine.com/products/desktop-central/agent_installation_failure_storage.html)  
5. [The storage control block is invalid](https://www.manageengine.com/products/desktop-central/patch_scanning_SCB.html)  
6. [Scanning Timed Out](https://www.manageengine.com/products/desktop-central/patch_management_time_out.html)  

**Applies to:** Patch Scanning, Manual Patch scanning, Patch Scanning Failure, Patch Deployment  

**Keywords:** Scan Patches, Patch Scan Failure, Scan Patches Manually