In PSoC Creator 4.2 and above, If you are working with a project in the schematic editor, and if you change a pin from output to input to output and drag it to a component, like an SPI device, you may get an 'unconnected' error on the pin.
This error will not go away during that session. The solution is to quit PSoC Creator and restart it. Something within the schematic editor will be reset by the restart, and you can continue without issues.
