I've been using pbc pro (v2.5) and had the same problem. One minute things were working, then they suddenly we not. Seems PBC does not like a long tree. I moved my source directory closer to the root of my main drive ( eg: c:\source\ ) and I stopped getting the out of memory errors. pbc also does not seem to like using network drives as the source/ output directory.

Anyone else seen this? I have not seen it as a fix for the pbc or pbcwin out of memory issue. Does seem to work though.