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Googling shows that cleaning the electrical connectors between body and lens can often fix that error.
maybe pull the battery for a few minutes too.
no CF card try to take a picture and get the same "err99".
Yes, try with a lens installed and with a good memory card installed. Lacking either of those will get you an error.
You will be disappointed with the pics from the L32 compared to the Rebel. The better glass on the Rebel makes the difference.