Communication has been interrupted prematurely sometimes a user will disconnect the LogTag too early, which will cause this error to be displayed.USB ports have a limited ability to supply power and we would always recommend to connect the USB interfaces directly to the computer or to use a powered hub. There is not enough power to the interface (USB) We have seen this error when USB interfaces are used on unpowered USB hubs with other equipment also connected.There is a "stuck" contact pin in the interface look inside the slot – there should be three contact pins visible, they should slide in and out with moderate resistance when force is applied (e.g.Usually this can be rectified by cleaning the contacts on the LogTag (a good way is to use a soft pencil eraser.) There is poor contact between the LogTag and the interface contacts this can happen if the contacts are dirty or have suffered from exposure to a corrosive environment.Here are some scenarios in which these errors could occur and what to do to rectify the issue: Often this error will disappear by simply repeating the action you were performing when the error occurred, but sometimes it can be a bit more difficult to locate the cause.
The letters and numbers after $4 represent type and serial number of the interface. In other words, a these errors mean there was no reply from the LogTag. "Internal error $4" and "LogTag failed to respond " are very general error messages which simply mean that LogTag Analyzer found an interface and a LogTag unit inside the interface, but was unable to establish communication.