exception

[nite]

I regularly get this as a javascript alert with a datatable - very easy to reproduce if I flip to another tab (than the DT is on) before it finishes first render. Any ideas?

DataTables warning: table id=DataTables_Table_1 - Error in seq.default(as.integer(q$start) + 1L, length.out = as.integer(q$length)): length must be non-negative number

filter = "bottom", options = list(deferRender = F,autoWidth = F,dom = "frtiS",scrollY = 600,scrollCollapse = F),extensions = c('ColReorder', 'ColVis', 'Scroller', 'TableTools'))

[yihui]

Could you provide a self-contained example? Thanks!

[phillc73]

Users of my application are also reporting a very similar errors:

DataTables warning: table id=DataTables_Table_9 - Error in seq.default(as.integer(q$start) + 1L, length.out = as.integer(q$length)): length must be non-negative number

DataTables warning: table id=DataTables_Table_12 - Ajax error. For more information about this error, please see http://datatables.net/tn/7

Providing a self-contained example is very, very difficult because the issue is so intermittent. I've never seen it personally in testing, and of perhaps 100 regular users, only two or three have reported it happening once or twice. None of them are very technical. Perhaps the best I could do is obtain a screenshot.

I could specifically extract table id=DataTables_Table_9 (or 12) into a self-contained example to see if you can reproduce. However, I'm not sure how to determine which is table id=DataTables_Table_9, without reference to the id names used in my application.

[yihui]

@phillc73 Okay, let me push a potential fix anyway even though I cannot reproduce the problem. Thanks!

[phillc73]

@yihui I was going to say that the linked datatables page suggests adding:

$.fn.dataTable.ext.errMode = 'throw';

To throw the errors to console. I was considering doing this in my app, but if this will be your fix anyway....

[yihui]

Okay, I think the error should go away now in the development version. Ideally I should find a fundamental fix, but it is so difficult without a reproducible example...