TC_t200_n200 BTS_Tests_LAPDm

Failing for the past 27 builds since #2697

Took 22 sec (from Titan)

Stack Trace

FBSB Failed with non-zero return code 255
      BTS_Tests_LAPDm.ttcn:1351 BTS_Tests_LAPDm control part
      BTS_Tests_LAPDm.ttcn:1171 TC_t200_n200 testcase