I'm trying to run a Factor Analysis on a large environmental data set with a combination of data types, and i'm having some difficulties. I get a Warning message listing a number of possibilities of what could have gone wrong. One option is that I have variables with zero variance. i've run a descriptive statistics listing variance and eliminated from my analysis those variables with zero variance listed. I've also run a scree plot and found some variables giving null data, so I've eliminated those from my factor analysis, still no luck. I'm not sure what to try next?! Any idea on what might be causing this? I'm using SPSS 19 with over 300 variables. The data was imported from Excel. Any suggestions would be wonderful!