What other plugins are being used?

Maybe try eliminating plugins one by one. Try without Dimension, if you still have problem, turn it back on and test the next one. Test FX too if applicable.

If you find an offending plugin a fix may be something like installing the VST version (if available) vs the DX one.
I've seen buffer handling issues in plugins before. Even some that work fine on one machine but crash another.
There may be an RB update that fixes it, depending on your version. See if you have the most recent update for your version of RB
http://www.pgmusic.com/support.realband.htm


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