Run-time error on a particular track on rFactor

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I'm using F1RFT 2012 (with heavily modified gen files) with 30 cars (my own liveries) and on CTDP Bahrain (with modified run off graphics and range of night lighting so there is more visibility at particular corners at night), I used the same version in daytime a couple of years ago and all fine, and around a third to halfway into the race, the game crashes to desktop. I am thinking it's to do with the track because on Melbourne, it's absolutely fine, had no problem at all. So what is the issue then? Is it the range of night lighting that's causing the issue? Is it the track in general? Please help me cos i need this sorted ASAP.

 

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I have modified the range of every single light to 400.0000000

 

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I've put the range of each light back to how it was and still I've had a run-time error.