[Namazu-users-en] NMZ.w File too large

We are using Namazu 2.0.15 on SuSe Linux.
Error from command namazu -d test:
...
namazu(debug): /usr/local/var/namazu/index/NMZ.w: File too large
Results:
References: [ (can't open the index) ]
...
The size of NMZ.w is 2421356497.
Any hints are welcomed.

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