db2start exec() failure

From Wikistix

If the following error occurs: 

db2sid> db2start
exec(): 0509-036 Cannot load program /db2/db2sid/sqllib/adm/db2star2 because of the  following errors:
        0509-119   The l_nimpid field in the .loader section header
                   is not positive.
        0509-193 Examine the .loader section header with the
                 'dump -Hv' command.
06/27/2006 11:31:17     0   0   SQL1042C  An unexpected system error occurred.
SQL1032N  No start database manager command was issued.  SQLSTATE=57019

Run db2iupdt for the instance, which may return a similar error, but may also fix the issue. If this fails, delete and re-install DB2.

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