UNIX> setenv CDS_AUTO_64BIT ALL
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So, ideally it is not recommended to put <>/tools/inca/bin in the path. You must put the standard directory locations in the path viz. <>/tools/bin in such cases. Also, ensure that you do not have anything from IUS hierarchy in the LD_LIBRARY_PATH variable.
Please check your PATH/path env variable and make the changes as recommended above.