To find an incorrect connection:
By default, the Connection Trace Log starts with all connections in your visual part set as connection breakpoints and tracepoints, meaning it suspends execution and displays information for every connection. You can change the initial tracepoints and breakpoints by selecting the Specified, All, or None radio buttons for Break on and Trace.
To inspect variables, select a variable in the debugger and then select Inspect from the variable pane's pop-up menu.