Resolution:
This situation may occur if you can not determine which BusinessConnect Software installer (64 bit or 32 bit) was used.

You can check the file type of bcengine binary executable in &ltTIBCO-HOME>/bc/5.x/bin directory.

Example : (Unix)
$ file &ltTIBCO-HOME>/bc/5.3/bin/bcengine
&ltTIBCO-HOME>/bc/5.3/bin/bcengine: ELF 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for GNU/Linux 2.4.0, dynamically linked (uses shared libs), not stripped

$ file  &ltTIBCO-HOME>/bc/5.2/bin/bcengine
&ltTIBCO-HOME>/bc/5.2/bin/bcengine: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.5, dynamically linked (uses shared libs), not stripped

Windows does not provide in-build 'file' command. However this utility can be downloaded from
http://www.vowles-home.demon.co.uk/utils/windows_file_exe.htm
or
http://gnuwin32.sourceforge.net/packages/file.htm

The TIBCO Administrator does not display whether the 64 bit version or the 32 bit version of BusinessConnect is installed under 'Installed Software' link. How can you determine which version of BusinessConnect is installed ?