> For the complete documentation index, see [llms.txt](https://docs.devolutions.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.devolutions.net/rdm/knowledge-base/troubleshooting-articles/access-violation-exception-error-in-rdp-sessions.md).

# Access violation exception error in RDP sessions

Fix the System.AccessViolationException error in RDP sessions by disabling API hooking in Remote Desktop Manager settings.

When trying to open a RDP session entry, you may encounter the error message "An unexpected error has occurred. Please check the application logs for more information." When checking the application logs, the following error is displayed: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

### Solution

Disable the RDP API hooking in the Remote Desktop Manager settings:

1. Go to ***File – Settings – Types – Remote Desktop – API Hooking***.
2. In the ***Enable API hooking*** drop-down list, select ***Disabled***.
3. Restart Remote Desktop Manager to apply the changes.


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