If you are getting this error ( shown below ), then its a clear file permission issue.
To fix the issue, change the file permissions to 755 or 777. This will add execute permission to the files and will allow the installer to be run.
=======================
wasadmin@pocserver01:/installables/im$ ./installc -log /installables/iim_installation.log -installationDirectory /IBM/iim -acceptLicense
Installc:
JVM terminated. Exit code=13
/installables/im//jre_6.0.0.sr9_20110208_03/jre/bin/java
-Xms40m
-Xmx512m
-Xquickstart
-Xgcpolicy:gencon
-jar /installables/im/plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
-os linux
-ws gtk
-arch x86
-launcher /installables/im/installc
-name Installc
–launcher.library /installables/im/plugins/org.eclipse.equinox.launcher.gtk.linux.x86_1.1.200.v20120522-1813/eclipse_1502.so
-startup /installables/im/plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
–launcher.overrideVmargs
-exitdata 20002
-toolId installc
-accessRights admin
-silent input @osgi.install.area/install.xml
-log /installables/iim_installation.log
-installationDirectory /IBM/iim
-acceptLicense
-vm /installables/im//jre_6.0.0.sr9_20110208_03/jre/bin/java
-vmargs
-Xms40m
-Xmx512m
-Xquickstart
-Xgcpolicy:gencon
-jar /installables/im/plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
wasadmin@pocserver01:/installables/im$ chmod 754 *
wasadmin@pocserver01:/installables/im$ ./installc -log /installables/iim_installation.log -installationDirectory /IBM/iim -acceptLicense
Installc:
JVM terminated. Exit code=13
/installables/im//jre_6.0.0.sr9_20110208_03/jre/bin/java
-Xms40m
-Xmx512m
-Xquickstart
-Xgcpolicy:gencon
-jar /installables/im/plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
-os linux
-ws gtk
-arch x86
-launcher /installables/im/installc
-name Installc
–launcher.library /installables/im/plugins/org.eclipse.equinox.launcher.gtk.linux.x86_1.1.200.v20120522-1813/eclipse_1502.so
-startup /installables/im/plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar
–launcher.overrideVmargs
-exitdata 28002
-toolId installc
-accessRights admin
-silent input @osgi.install.area/install.xml
-log /installables/iim_installation.log
-installationDirectory /IBM/iim
-acceptLicense
-vm /installables/im//jre_6.0.0.sr9_20110208_03/jre/bin/java
-vmargs
-Xms40m
-Xmx512m
-Xquickstart
-Xgcpolicy:gencon
-jar /installables/im/plugins/org.eclipse.equinox.launcher_1.3.0.v20120522-1813.jar