Protel These errors occur when you finish drawing the schematic check #1 error multiple Net Identifiers

Error report For:documents\sheet1.sch    24-aug-2009  14:58:43

#1 Error  multiple Net Identifiers:Sheet1.Sch VCC at (290,920) and Sheet1.sch GND at (290,700)
#2 Error  multiple Net Identifiers:Sheet1.Sch (1330,730) and Sheet1.sch ADDRESS3 at (1340,730)
#3 Error  multiple Net Identifiers:Sheet1.Sch BTY at (1350,710) and Sheet1.sch (710,580)
#4 Warning   unconnected net Label on Net PFI
    Sheet1.sch PFI

#5 Warning   unconnected net Label on Net PFO
    Sheet1.sch PFO

#6 Warning   unconnected net Label on Net RESET
    Sheet1.sch RESET

#7 Error  multiple Net Identifiers:Sheet1.Sch MR at (1240,890) and Sheet1.sch WDO at (1340,890)

End Report

123 should be your name life repeats the same network you define VCC and define GND usually you forget to change your name when you put the power or the ground. 
 456 should be your three network without an actual connection Whether to forget the connection discipline or is more out of the delete it can be 
 the last one to look at or the same 123 problem back to the schematic diagram with the error mark you look at most can be resolved