moints semi: failed to open half int file


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Hi Yudong,

One thing that changed relative to nwchem-6.0 is that some quantities (such as integrals) are stored. Normally these would be written to a file. However, on some platforms like BlueGene and the current generation of Cray machines we noticed that disk I/O is particularly slow. So, for those platforms a mechanism was created to write the data into memory rather than to file. It seems that you are hitting a problem with that mechanism. This might be an issue if you are building nwchem-6.0 with GA 5-1 in particular.

For this case my advice would be to try nwchem-6.1.1 where this issue has been ironed out.

Best wishes,

    Huub