DB2 HADR problem - corrupted installation ??

Hello,

I have a problem with my db2 hadr:

- I have two systems in my HADR configuration, lts call them node1 and node2
- Both systems are running SUSE Enterprise Server 11
- Database version is: 9.7 patchlevel 4

Node1 was primary node and node2 was standby node. HADR was nearsync.
I have decided to upgrade node1 so I did a takeover to node2. After upgrade I have rebooted node1 and set up HADR once again so that node1 was standby and node2 was primary.

After I tried to do a switchover I received a reason code 10 and was unable to do a takeover to node1.

I thought that something got corrupted on node1 regarding the datafiles or logs etc. so I shut down HADR alltogether, but the problem was that db2stop did not work anymore on node1 (node2 works fine by the way).

So on node1 I killed the instance (there was no other way) and now when I try to do db2start I get this messages:

"SQL5043N Support for one or more communications protocols failed to start successfully. However, core database manager functionality started successfully."

And this in the log file:

2013-08-20-16.25.26.522278+120 E157579679E306 LEVEL: Event
PID : 13101 TID : 140737352853280PROC : db2star2
INSTANCE: db2insp1 NODE : 000
FUNCTION: DB2 UDB, base sys utilities, DB2StartMain, probe:911
MESSAGE : ADM7513W Database manager has started.
START : DB2 DBM

2013-08-20-16.25.26.560773+120 I157579986E454 LEVEL: Warning
PID : 13101 TID : 140737352853280PROC : db2star2
INSTANCE: db2insp1 NODE : 000
FUNCTION: DB2 UDB, oper system services, sqloInvokeVendorFunction, probe:50
MESSAGE : ZRC=0x870F0009=-2029060087=SQLO_EOF "the data does not exist"
DIA8506C Unexpected end of file was reached.
DATA #1 : String, 46 bytes
Pipe read from vendor process was interrupted.

2013-08-20-16.25.26.561028+120 E157580441E396 LEVEL: Error
PID : 13101 TID : 140737352853280PROC : db2star2
INSTANCE: db2insp1 NODE : 000
FUNCTION: DB2 Common, SQLHA APIs for DB2 HA Infrastructure, sqlhaDoesRGExist, probe:40
RETCODE : ECF=0x9000052D=-1879046867=ECF_SQLHA_VENDOR_CALL_PROG_ERROR
HA Infrastructure vendor function call internal error

2013-08-20-16.25.26.561119+120 I157580838E344 LEVEL: Error
PID : 13101 TID : 140737352853280PROC : db2star2
INSTANCE: db2insp1 NODE : 000
FUNCTION: <0>, <0>, <0>, probe:100
RETCODE : ECF=0x9000052D=-1879046867=ECF_SQLHA_VENDOR_CALL_PROG_ERROR
HA Infrastructure vendor function call internal error

2013-08-20-16.25.26.561160+120 I157581183E335 LEVEL: Severe
PID : 13101 TID : 140737352853280PROC : db2star2
INSTANCE: db2insp1 NODE : 000
FUNCTION: DB2 UDB, base sys utilities, DB2StartMain, probe:754
DATA #1 : Hexdump, 4 bytes
0x00007FFFFFFFE1F4 : AA00 7382 ..s.

2013-08-20-16.25.26.561240+120 E157581519E271 LEVEL: Warning
PID : 13101 TID : 140737352853280PROC : db2star2
INSTANCE: db2insp1 NODE : 000
FUNCTION: DB2 Common, SQLHA APIs for DB2 HA Infrastructure, sqlhaOnlineDB2Partition, probe:71


Does anyone have a clue what is wrong ? Is my installation corrupted on node1 ?
I have no problem with reinstalling the DB2 and recreating the instances etc. but I would rather solve the problem. I have searched the web, but IBM documentation is pretty scarce regarding DB2 help.

Thanks in advance and best regards.