TC reported Front DT car, A4 train doorsnot proven closed. TC opened and closed twice to clear faul t. ERS-10 ~~~~~ TC reported Front DT car, A4 train doors     #3629-A4 door check and found bottom guide width 17mm.Suppose to be 18-19.5mm.Adjusted to 18mm.Conducted door cycle test 100 times,no fault found.Downloaded ER,Fault trace data on PTU,push/pull gauge,roller tested ok and door gap ok. Done by Jack/Sateesh/Koh. 27/05/20