Hello,
what version of RC do you use? Did you use Unwrap before texturing? If yes, what was your Unwrap settings?
Can you check if there are any alignment problems, some problematic parts of the model?
Also please take a look at this thread:
https://support.capturingreality.com/hc/en-us/community/posts/115001014631–SOLVED-Texturing-problem-Out-of-Memory