Problem with Customer List

[pdxmarkg]

I've been using Zen Cart 1.3.8 for over 6 months and have had no problems... until recently.

I'm getting an error message at the top of my Customer List and cannot access the customer records to either edit or delete a customer. Interestingly this is the only problem -- everything else is working and customers can still successfully order products.

Here is the error message:
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Warning: array_merge(): Argument #1 is not an array in /hsphere/local/home/clubgspot/club-g-spot.com/gshop/admin/customers.php on line 1099 Warning: array_merge(): Argument #2 is not an array in /hsphere/local/home/clubgspot/club-g-spot.com/gshop/admin/customers.php on line 1101 Warning: reset(): Passed variable is not an array or object in /hsphere/local/home/clubgspot/club-g-spot.com/gshop/admin/includes/classes/object_info.php on line 29 Warning: Variable passed to each() is not an array or object in /hsphere/local/home/clubgspot/club-g-spot.com/gshop/admin/includes/classes/object_info.php on line 30
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I'm also attaching a screen-shot of the issue.

Hopefully someone can resolve this for me.

Thanks,
Mark