Errors: A data source instance has not had been supplied for the data source "DataSetTable
"Code:

Crystal reports data sets:

Data set attributes:


Recently do print, think crystal reports to do A lot of easily. So I tried to do, but at run time errors: A data source instance has not had been supplied for the data source "DataSetTable
"Could not find the reason, so send a post, I hope someone can help me to find the cause of the error, is very urgent.

Crystal reports refer to the link below.
https://blog.csdn.net/qq_36074218/article/details/84541338
(if there is any infringement, please contact deleted. Put a link to answer this question is the cause of friends, convenient to know that I do)