Chimera.uchime crashes help please!

Hi all

Running an analysis using only 4 samples. Everything seems ok up to now, but every time I run chimera.uchime mothur stops working just as the analysis is finishing and no files are updated in the folder (.accnos etc). I only have 4 processors available, now trying to run with just one, does anyone have any suggestions please? I am running in Windows 8.1, have read of problems with this command in previous releases of mothur using Windows, but I’m using the latest release v.1.34.4). Thank you so much

Can you post the command as you are running it? Also, how many unique sequences are in each of your samples?