In SX Microcontrollers, SX/B Compiler and SX-Key Tool, dkemppai wrote:

The different names for supply pins are sometimes a PIA when you use a PCB layout program, like EGALE where library components can have implied supply pins. This means that such pins by default are not visible with the component's schematic symbols, and the software automatically "connects" such pins to equally-named nets in the schematic (if they are there). Imagine what happens when you want to use one library component with implied names Vcc and GND together with another one with implied Vdd and Vss names. Most likely, the electrical rule check wiull give you an error.

 
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Typically, in eagle, you recieve a warning, not an error....   ...when you connect VDD, VCC, and +5V...  ...there is a little difference between the two.  :-)     Errors are show stoppers, where warnings are just warnings. 

 

-Dan

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