Hi Hemant,
Please share which all values are maintained in SNP2 tab of product master at DC. Maintaining safety stock at any location is not mandatory. Also, please share the details of distribution demand coming at DC (start date/end date/qty etc.).
Providing screenshots from MAT1, RRP3 (rrp3 screenshot to check demand and receipts at DC) and planning book at DC level will help to identify the reason. Also, please confirm if you were able to create a distribution receipt at DC from plant manually?
Regards,
Umesh