Warning: Invalid lightmap samples

What does this message mean? This refers to the light cache? My settings are: subdivs 1000, sample size 0.01 scale - screen, # passes 4. The scene renders, I just suddenly received this message. Will it cause me problems?

This usually means that one or more rays, which have been traced during the GI calculation, have reached out of range numbers like:

1 intensity is more than 100%
2 overbrighted areas
#3 problems with UV coordinates
4 buggy materials (usually with wrong setups of glass-type mtls )
etc.

Lots of time this warning doesn’t show any visual artifacts, though there is a problem somewhere.

Best regards,
nikki Candelero

thanks nikki!