ORA-12705: Cannot access NLS data files or invalid environment

Question

The other day I got this annoying oracle error: ORA-12705: Cannot access NLS data files or invalid environment specified. Funny thing I wasn\'t trying to access NLS data fil

Answer 1

I have Oracle 10g XE and Windows 7. I resolved this as follows:

Go to Control panel > Regional and language options > Format and set your language.