PADS原理图同步PCB时出现问题，请大家指教一下

PADS原理图同步PCB时出现问题，请大家指教一下
PCB Net List Errors Report - 051.sch - Sun Jan 01 11:42:41 2012
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Design to Library Part Consistency Check
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No Library consistency checking errors.
Single/Zero Pin Net Warnings
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No single or zero pin nets.
Schematic Connectivity Errors
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Power or Ground Symbols used with wrong Net Name
GND
Sheet 1X8300Y9000- PowerSymbol used for net: +5V
Sheet 1X6500Y9700- PowerSymbol used for net: +5V
Sheet 1X15200 Y12300 - PowerSymbol used for net: +5V
Sheet 1X9500Y8600- PowerSymbol used for net: +5V
Sheet 1X7100Y9000- PowerSymbol used for net: +5V
Sheet 1X4600Y9200- PowerSymbol used for net: +5V
这个是什么意思？为什么会出现这个问题？大家帮我看下

今天论坛没人吗？大家帮帮忙呀！谢谢了

大家救命呀！这个问题我想了好几天也没想出来 那位好心的高手大哥救救我呀！