I am getting the following error while trying to create a data driven subcription for a report:
Data driven subscriptions cannot be createdbecause the credentials used to run the report are not stored,the report is using user-defined parameters values, or if a linked report, the link is no longer valid.

As it is given, there might be three things which causes this problem. In my report:
- the credentials are saved (stored)
- the reports have some integer and date parameters which are hidden
- the report does not have a linked report
So, my doubt is: do I get this error because of the parameters? If so, what is the solution?