Source:  AURP-5.10

Explanation:  The router could not acquire sufficient packet receive buffers, also called event control blocks (ECBs). AURP was trying to send an Open Request when the ECB allocation error occurred. AURP pauses and then tries to send the Open Request again. This might be a temporary condition, or it might indicate that the number of ECBs available is not sufficient to support the server load.

Action:  Refer to the System Messages and Error Codes documentation for information about correcting this condition.