This same installation of Weka has loaded for me in the past. I am simply trying to load the Weka GUI (double click on the icon) and I get the following error. How can I f
I'm not sure why you were able to use it before but not now. However, you can specify a larger heap size by changing the RunWeka.ini configuration file. On a Windows machine it should be in the Weka folder of your Program Files directory. You could try a line specifying, for example,
maxheap=200m
There might already be such an option in that file that you can simply change to a larger number.