Xpath constraint Error from tutorial

i have this : `StartDate >= '[%CurrentDateTime%]']` constraint in my Xpath.   But I dont understand why I get this error: "15 _ Error(s) in XPath constraint. _ Action activity 'Retrieve list of ScheduledCourse from database' _ Microflow 'DS_GetDashboardData' _ TrainingManagement"   When I click on the error the StartDate gets highlighted. The training link I follow is : https://gettingstarted.mendixcloud.com/link/module/10/lecture/91 And the item number is number : 22
1 answers

In the Training there was no leading `[` When I search for other xpath like from this link "https://docs.mendix.com/howto6/define-access-rules-using-xpath" I saw that it has to have a leading "[" so I added it and it fixed. 



I hope that this can help people in the future