Cause

You have opened a project that was created with an older Eplan version (Version 2026 and older). For this project it has been specified that the Connections tab is to be used for terminals and pins. By using the settings in this tab, the targets of terminal connection points and pins deviating from the graphic can be reported.
There are at least two form positions with the same name for one or more targets at the first and / or second function connection point of the pin that was either generated in the plug navigator or placed in the schematic.

Solution

1. Double-click in the plug navigator or in the schematic on the pin and select the Connections tab in the Properties <...> dialog.
2. Rename the form positions with the same name for the targets at the first and / or the second function connection point of the pin.
3. If required, start a new check run.