DB2 Universal Database Version 5.2 for AIX uses a level of the
NetQuestion double-byte character set (DBCS) search engine that will
not work properly if certain levels of NetQuestion are already present
on your AIX operating system.
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For example, if DB2 UDB V5.2 for Japanese, Korean, Chinese or Taiwanese
is installed on any AIX operating system where DBCS documentation
for VisualAge C++ Professional V4.0 for AIX is already installed, or
if it is installed on an AIX 4.3 operating system where DBCS native
help is already installed, you will not be able to use NetQuestion to
search any DBCS documentation you may have installed with DB2.
This problem is due to the fact that the search CGI used by
other NetQuestion exploiting products is incompatible with the
search CGI shipped with DB2 UDB V5.2 for AIX.
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To correct this problem you must replace the search CGI in
/var/docsearch/cgi-bin/ and /usr/docsearch/cgi-bin with an updated
search CGI:
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1. Download or copy the updated search CGI, called db2srdbcs, (using
   the binary transmission mode) from
   IBM's service ftp site to /var/docsearch/cgi-bin/ and
   /usr/docsearch/cgi-bin/.
   This will overwrite the existing db2srdbcs files in these directories
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2. Stop and restart the DB2 DBCS search engine for this change to take
   effect:
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   To stop the search engine type:
    usr/IMNSearch/bin imqss -stop dbcshelp .
   To start the search engine type:
    usr/IMNSearch/binimqss -start dbcshelp.