TIMS showed 'B1' train doors in the Front M1 car in isolated mode intermittently. Staff (BDL) checke d and confirmed no abnormalities on said train doors. ~~~~~ TIMS showed 'B1' train doors in the 1665 car in isolated mode intermittently. Staff (BDL) checked and confirmed no abnormalities on said train doors. Pls check at depot  Check and found B1 LHS outer door roller delaminated, C/O ok. Matting strip, Push/pull, DLS red line, DSS, Door function and door static test ok Done by Sanip/jack 45117