Train doors at rear M1 car B1 door werenot proven closed. TC recycled train doors once - ok.Faultdid not recurred at subsequent stations. Train doors at rea r M1 car B1 door were not proven closed. TC recycled train d ~~~~~ Train doors at rear M1 car B1 door were        #1538-B1 door function test found out door roller worn at both RHS & LHS.No foreign object found.To be follow up due to non platform side. Checked by Gopal/Haslan. 15/06/23