[R] Prediction from a rank deficient fit may be misleading

[Michael Artz]

HI all,
I have the following error -
  >  resultVector <- predict(logitregressmodel, dataset1, type='response')
Warning message:
In predict.lm(object, newdata, se.fit, scale = 1, type = ifelse(type ==  :
  prediction from a rank-deficient fit may be misleading

I have seen on internet that there may be some collinearity in the data and
this is causing that.  How can I be sure?

Thanks

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