2030919 - BWA cannot start - Error in topology.ini

The SAP BW Accelerator (BWA) cannot start due to the following error related to the topology.ini or topology.ini.bck file in the BWA trace files of type TrexNameServer_<host>.trc:

[140132308920064] 2014-06-16 05:35:38.743 e NameServer   TREXNameServer.cpp(08938) : loading topology failed. trying /usr/sap/<SID>/TRX<NR>/topology.ini.bck
[140132308920064] 2014-06-16 05:35:38.750 e topology     Topology.cpp(00226) : line 46989: excepted < or > , got U
[140132308920064] 2014-06-16 05:35:38.751 f NameServer   TREXNameServer.cpp(02098) : An error occured, while loading the topology file -> Stopping Instance ...
[140322636035840] 2014-06-16 05:36:00.796 e topology     Topology.cpp(00192) : line 20435: <> not expected as first char, got <3

SAP NetWeaver BW Accelerator 7.20

SAP NetWeaver BI Accelerator, BIA, wrong custom base path, update to BWA 7.20, Migration, <custom>, /usr/sap/<SID>/TRX<NR>, /usr/sap/<SID>/SYS/global/trex/data , KBA , BC-TRX-BIA , TREX BI Accelerator , BW-BEX-OT-BIA , BW Accelerator , Problem