Building Automation Knowledge Base

Issue How is a subnet defined? Environment Refer to "TCP/IP Network Administration" by Craig Hunt, O’Reilly & Associates, Inc. Cause Sectioning network communication by subnets. Resolution A subnet is defined by applying a bit mask (subnet mask) to the IP address. If a bit is on in the mask, that equivalent bit in the address is interpreted as a network bit. If a bit in the mask is off, the bit belongs to the host part of the address. The subnet is only known locally.

Issue Error message "Access denied" when starting TAC Vista Server Environment Vista Server Cause To start TAC Vista server you have to be an administrator on the computer. Resolution To start TAC Vista server you have to be an administrator on the computer. If you want to log in to TAC Vista with a user that isn't an administrator, you have to run TAC Vista Server as a service. The service has to be started with an account that is an administrator on the computer.