If the field, TIMETABLE::DATE is the date of the record you're trying to filter, including only the current month, try changing your Set Field step to set this field to this calculation (or to a variable containing the result of this calculation):
Month( Get(Currentdate) )
FileMaker will transform this into a search for any date in the current month!
If you are still having trouble with this, can you describe specifically how it is not working? Is it returning dates that should not be included, or omiting dates which should be included, both, or finding no records at all?
That is a great idea, Erik !!
After added a new calculated field with the month only, I created a new script to be executed as soon as the report is opened.
This way its convenient to the user to have the report in the current month!!
Thank you for your help.