The number of ICMP messages which this entity did not send due to problems discovered within ICMP, such as a lack of buffers. This value should not include errors discovered outside the ICMP layer, such as the inability of IP to route the resultant datagram. In some implementations, there may be no types of error which contribute to this counter's value. This object has been deprecated, as a new IP version-neutral table has been added. It is loosely replaced by icmpStatsOutErrors.