The connector pane of a subVI has changed since it was added to the block diagram. LabVIEW dims the subVI on the block diagram to indicate that the connector pane has changed.
To correct this error, right-click the dimmed subVI and select Relink To SubVI from the shortcut menu. LabVIEW uses the new connector pane pattern and attempts to reconnect any existing wires to the new pattern. When LabVIEW is finished, the subVI appears in its normal, darker colors. To double-check that these connections were made properly, select Help»Show Context Help to open the Context Help window and move the cursor over the subVI.
If you want to maintain the old wiring pattern, double-click the subVI to open its front panel and select the old wiring pattern.