Weka GUI - OutOfMemory

"Not enough memory. Please load a smaller dataset or use a larger heap size."

Weka sometimes gives this error, if you use large datasets. To handle it, specify a larger heap size by changing the RunWeka.ini configuration file. The file is in the Weka folder of your Program Files directory on Windows. You should increment the value of the variable which regulates maximum heap size, such as "maxheap=1024m".