Lowering priority since it only affects edge cases. Whoever maintains this extension can re-prioritize if they feel differently.

3000 articles is a lot, by anyones standard. The obvious solution is to just do it in 3 smaller batches

Setting lowest priority; workaround available plus cornercase

It's actually nice to hear it manages to output a ZIM with 1100 pages, do you have a link? :-)

(In reply to drsalmanshah165 from comment #0)

i created a book which contains nearly 3000 articles

On what wiki was this? $wgCollectionMaxArticles should be set to a value which the rendering is actually able to sustain, and prevent users from being confused (bug 26775).

If you managed to export 1100 pages, and if it works for PDF as well, we could raise default $wgCollectionMaxArticles to 1000; if your book was already above the limit, then it's bug 26775.