Error 100 indicates that your receiver is not reachable. 

This can happen if the computer and receiver are on separate networks or separate networking devices, or if the Ditto room has been configured with incorrect details. 

This also may happen if the network is not configured to allow Ditto to communicate. Most often, configuration issues are related to closed ports on the network or security policies with a firewall. 

Your networking team can use the details contained in the document linked below to ensure that the network is compatible with Ditto. 

Ditto Technical Requirements