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PSpice for TI 放置不了Vdc或者是GND,出现because library 'source' does not exist

在part search里面搜索VDC再放置,会出现“library source doesnot exist”的错误。而且像是最右侧栏的GND、VDC的快捷按钮放置都是空白的,放不了。