Gantt chart Title values error

ksivaganesh99 never used it but the message is self-explanatory, did you tried by filtering some rows and see if it works. 

Hi ksivaganesh99 , 

Yes, as parry2k  mentioned, the Task or Parent can't show all fields or values in chart, so I suggest you could add filter on these fields to control values to see whether it work or not.

Best Regards,
Zoe Zhi

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