Timeline slicers

Hi friends of Excelguru!

I have a table of 340 lines consisting of 3 fields, including a date field. Using a pivot table I can use a Timeline slicer to view the information I want according to the dates I want. The Timeline option is available with 345 records, but when I add 1 or more records, the option is no longer available.
What can be done to view hundreds or thousands of records?

Thanks for your help in advance!

Luis Antonio
lcallejas2000@gmail.com

Edit Mod : this thread relates to http://www.excelguru.ca/forums/showthread.php?4251-Timeline-Slicer

Hi friends!
I finally found my error. I am working with the commercial year and I included the date 30/2/2015, where Excel only recognizes for Timeline Slicer true dates.
I hope this can help other people that my face this problem.

Luis Callejas

@Luis
please do not hijack other threads. Best to create a new thread and if necessary add a link to the existing one.