2022169 - Error 6.900 has occured in SAP HANA/BWA server - BWA

When executing a query for example in transaction RSRT there is the following error present in BW Accelerator (BWA):

Error reading the data of InfoProvider RPMRR01$X
Error Error 6.900 has occurred in the SAP HANA/BWA server
Error 
Error Errors occurred during parallel processing of query 33, RC: 3
Error Error while reading data; navigation is possible
Information >> Row: 54 Inc: WRITE_MESSAGES Prog: CL_RSDR_AT_QUERY

The detailed error message in the TrexIndexServerAlert_<host>.trc trace file looks like below:

[1098946880] 2014-05-26 10:58:10.510 e euclid       OlapOperations.cpp(03516) : unknown union col $sie$sr_ocomp__$sie$sr_oiso_sid in table itab_53823277F72751D8E1000000C0A8A430
[1098946880] 2014-05-26 10:58:10.511 e executor     X2.cpp(00568) : <plan_10454@hchost15:30103> popHasAllInputs() found invalid state deleted for connector a544
[1104210240] 2014-05-26 10:58:10.511 e executor     PlanExecutor.cpp(00200) : plan <plan_10454@hchost15:30103> failed with rc 6900; Attribute engine failed
[1104210240] 2014-05-26 10:58:10.612 e SERVER_TRACE TRexApiSearch.cpp(06340) : IndexID: 0bw:bia:ib1:_cs_ltz7yclaaqpohomwpi7x6jpurq, QueryMediator failed executing query, reason: Attribute engine failed;BwPopUnionItabs pop474(add_clone('$INPUT_0$', '$sie$sr_opcomp__$sie$sr_oiso_sid', 'rppcountr_sid'),add_clone('$INPUT_0$', '$sie$sr_ocomp__$sie$sr_oiso_sid', 'rpcountry_sid'),add_clone('$INPUT_1$', '$sie$sr_opcomp__$sie$sr_oiso_sid', 'rppcountr_sid')),in executor::Executor
[1104210240] 2014-05-26 10:58:10.617 e CalcEngine   cePlanOperations.cpp(03408) : ceMultiproviderPop (rpmrr01____5382233bf72751d8e1000000c0a8a430): Execution of search failed: Attribute engine failed;BwPopUnionItabs pop474(add_clone('$INPUT_0$', '$sie$sr_opcomp__$sie$sr_oiso_sid', 'rppcountr_sid'),add_clone('$INPUT_0$', '$sie$sr_ocomp__$sie$sr_oiso_sid', 'rpcountry_sid'),add_clone('$INPUT_1$', '$sie$sr_opcomp__$sie$sr_oiso_sid', 'rppcountr_sid')),in executor::Executor(6900)
[1097894208] 2014-05-26 10:58:10.622 e executor     PlanExecutor.cpp(00200) : plan <plan_10453@hchost15:30103> failed with rc 6900; Attribute engine failed

SAP NetWeaver BW Accelerator 7.20

BIA, BWA 7.2, trexops, individual access per infoprovider, Error 6.900 has occurred in the SAP HANA/BWA server in BW Accelerator , KBA , BC-TRX-BIA , TREX BI Accelerator , BW-BEX-OT-BIA , BW Accelerator , Problem