regression error

[Joe Cerniglia <cj5815@yahoo.com>]

I am recieving the following error while running the
following regression:

ret.size.ols <- lm(formula = returns ~ ln.size,
na.action = na.exclude)

Problem in lm.fit.qr(unset(x), unset(y)): computed fit
is singular, rank 1 

What could be causing the problem?  Are there
functions that can modify the data?

This call to lm is in a loop.  If an error occur the
loop ends. How can I get the loop to continue if an
error occurs?

Thanks.



        
                
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