links:

downgrade to xlC.rte 6.0.0.0
http://www-1.ibm.com/support/docview...id=swg24008966

downgrade to xlC.tre 7.0.0.0
http://www-1.ibm.com/support/docview...id=swg21219598

===========================

4. Reverting to the previously installed C/C++ Runtime level

To revert to the V7.0 C/C++ runtime level, use the following steps:


Download the V7 base runtime and the fix level (if applicable) of th
C/C++ runtime you recorded before installing the Runtime Environmen
filesets. The base runtime and fix levels can be found at:

http://www-306.ibm.com/software/awdtools/xlcpp/support/.

A compressed archive containing the V7 base level C++ runtim
libraries filesets can be obtained from:

http://tinyurl.com/y6x3py


Force install the base level of the C++ runtime with the -F option
using the following command:
installp -aFXd xlC.rte xlC.aix50.rte xlC.msg.LANG.rte

where is the location of the install images
Apply the fix level (if required), using the following command:
installp -aXd

where:
is the location of the install images.
is the fileset to update.

or commit the fix level, using:

installp -acXd

where:
is the location of the install images.
is the fileset to update

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