Rasman port open failure

Summary

The Routing and Remote Access service or The Remote Access Connection Manager service encountered an error while opening a port for remote access.

Causes

The most common reasons for this error are:

• The Remote Access Connection Manager service failed to start the RAS Async Adapter driver (AsyncMac). The most common reasons for this error are:

• The RAS Async Adapter driver (AsyncMac) failed to initialize.

• The Remote Access Connection Manager service does not have sufficient permissions to open the driver.

• The Remote Access Connection Manager service failed to load rasser.dll.

• The modem has moved to an unsupported BPS rate.

• The serial driver could not allocate adequate I/O queues.

• Sample Event #1: An attempt by RASSER.DLL to get an async media access control handle failed.

• Sample Event #2: RASMXS.DLL cannot load RASSER.DLL.

• Sample Event #3: The modem on %1 moved to an unsupported BPS rate.

• Sample Event #4 The serial driver could not allocate adequate I/O queues.This may result in an unreliable connection.

• Sample Event #5:Remote Access Connection Manager could not reopen biplex port %1. This portwill not be available for calling in or calling out.Restart all Remote Access Service components.

Resolutions

• Check whether the System account has read/execute permissions for the file %systemroot%\system32\drivers\asyncmac.sys. To check the permissions:

• Right-click the file name, and then click Properties.

• On the Securities tab, verify that the System account read/execute permissions for the file.

• Verify whether the file rasser.dll exists at %systemroot%\system32 folder.

• Verify whether the System account has read/execute permissions for rasser.dll. To check whether the System account has these permissions:

• Right-click rastapi.dll, and click Properties.

• On the Security tab, verify whether the System account has read/execute permissions for rastapi.dll. If it does not, add them.

• Move the modem to a supported BPS rate.

• Stop and restart the Routing and Remote Access service.

• If the problem persists, you might need to repair or reinstall the Windows operating system

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