arrays - Magento upgrade from 1.6.2 - php error when checking magento list-upgrades in SSH -

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i'm using ssh upgrade magento 1.6.2 latest version. when enter command ./mage list-upgrades repeated lines of following before see upgrade results:

php warning: array_combine(): both parameters should have @ least 1 element in /var/www/vhosts/mywebsitename/httpdocs/downloader/lib/mage/connect/rest.php on line 227 php warning: ksort() expects parameter 1 array, boolean given in /var/www/vhosts/mywebsitename/httpdocs/downloader/lib/mage/connect/rest.php on line 228

i have latest version of php installed (i think) , checked online find original rest.php script , looks identical. ideas?


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