Network–Ping/No Ping

I have a particular IP address on a subnet, let’s say, 198.200.234.30 and I can ping this address from another subnet from all IP addresses but one particular IP, 198.200.235.230. There are no ACL’s in the router. When I trace route, the path stops at the 198.200.234.30 gateway, but all IP’s in that subnet can be reached. Any ideas?

Thanks,
skywalker