"Stops" does not contain valid input for any route

Q：hi all
when i try to solve my network again..

"Stops" does not contain valid input for any route. error appear in this part of code

naSolver.Solve(naContext, new GPMessagesClass(), new CancelTrackerClass());

Re：i am sorry i don't remember exactly but it was Network Dataset problem 

Just build the Network Dataset again and if this not help 

try to generate The network dataset and check if you made something wrong 

and if you are not sure ,you can send me The detials about the method you used to generate This ND

Thank you and hope your problem get solve

出现如标题的错误时是因为网络数据集的问题，可以再次重新建立网络数据集（这意味着网络数据已被损坏），如果还是不行，请确定你得数据是否能够建立网络数据，源文件是否有错误。