Hi, Im sorry to here that.
First make sure the batteries are fresh and installed correctly.
Even brand new batteries sometimes come in bad.
They should be checked with a meter.
Also make sure the battery contacts in the unit are clean BRIGHT AND SHINY or you will have this error.
If all of that checks out, and I would try a different set of new batteries I recommend Duracell ONLY of the this camera because that one draws a lot of current.
In any case, I will stick with you until this is complete.
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Thank you and have a wonderful day!