strange redner results with ies lights

[max montana]

hi, i try to make a nightversion of this rendering. i placed an ies light in every ceiling lamp. when i render the image i get strange results like this ones below.
i get an message like" overbright or invalid color..."
any suggestions what could cause this?

[vlado]

Does it happen on a simple scene with just one IES light with the same IES profile loaded?

Best regards,
Vlado

[max montana]

tried it with 1 ies light with the same ies profile, and worked fine.
with all lights in the scene i got the confusing results as before.
then i restarted the pc and the 1. rendering was just fine.
the next rendering with a fine adjustment on the ies multiplier again brought the strange render result....

[vlado]

I see; in that case would it be possible to send me the scene to vlado@chaosgroup.com so that I can check the issue?

Best regards,
Vlado

[max montana]

thanks vlado, reduced the filesize from 100mb to 10mb.
hope it gets through.