Train doors at Front DT car A4 door werenot proven closed. Staff(SOM) later isolated Front DT A4 do or in close position for train to depart. Train doors at Fro nt DT car A4 door were not proven closed. Staff(SOM) later i ~~~~~ Door unable to close fully.  3516 A4 door no FC found. Found weather strip rubber rubbing against door. Trimmed the weather strip rubber & no FOD found. Clean J-rail/guide rail, door gauging 10mm/20mm - OK. Door cyclic test & door open/close timing - OK. No DIR & all doors proven closed.  Sarma/Sugu/Alan/Anand/Kamarul/Shafie 45313 3516 A4 Train doors door were not proven closed. Staff(SOM) isolated 3516 A4 door in close position for train to depart.     3516 A4 door found LHS inner door rollers pitted. Replaced with new door rollers. Found #3516 A4 door RHS having heavy scratch marks. Conducted Door cyclic test & door was unable to close fully. OPS 20 raised to follow-up.  Daniel/Redzwan 45313