ERROR: Could not read any NLS message catalogue!

Hi,

Currently performing a Netweaver 7 BI installation.

Got to the point where I've installed Oracle 10.2.0.1, and I'm now attempting to patch it to 10.2.0.2.

When I perform ./runInstaller, I get the message 'ERROR: Could not read any NLS message catalogue!'

Can't find anything notewise within SAP support portal, and googling provides very little also.

Anyone help, thanks in advance?

Chris