No valid items selected for the current operation,exiting.用allegro的时候无法删除某些引脚焊盘,请教是为什么,

No items were selected! No valid items selected for the current operation,exiting.用allegro的时候无法删除某些引脚焊盘,请教是为什么, no valid config中文是什么意思? 手机上显示NO items Your session is no longer valid.Please valid valid NO items were selected什么意思 insert a valid SIM with no pin lock to activate No Valid Config 该怎么处理,又删不掉. 打开REALFLOW5时出现no valid licenses were found怎么办 pro/e出现是什么意思啊 No valid serve license servers availsble For avoidance of doubt,in case no valid warranty bond is provided 一键还原时出现ABORT:11032,THERE IS NO VALID SOURCE DRIVE TO CHOOSE是什么意思 用GHOST备份是提示“there is no valid source drive to choose”? the build of modern warfare 2 is no longer valid for online items 用英语解释这个词的意思No more than 3 words no toolbox items are applicable for the current selection,你怎么解决的具体点