Your graphic card/memory is exhausted. The finer the visualisation the more memory you need to show filament. So if you have not much memory or if the model is too big disable filament visualization or reduce visualization quality.
It means Repetier doesn't know how to handle video memory. I'm running an I7-8700 with a GTX 970 GPU and 4 GB of GDDR5 memory. Printing a little belt support 'exhausts' this memory? I don't think so.
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