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The e-commerce.

Problem using uksort in zonesx


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I have installed the zonesx-multiple packaging contribution and this works fine when the total weight is under the maximum (of 20Kg).

However, when it goes over this maximum, although the display in the checkout_shipping page is correct i.e.

Package 1 Postage to GB 18 kg(s) ?11.21

Package 2 Postage to GB : 3 kg(s) ?7.20

Total Postage to GB : 21 kg(s) ?18.41


I get the following warning at the top of the page :


Warning: uksort(): Invalid comparison function. in /xxxxx/web/catalog/includes/modules/shipping/zonesx.php on line 132


Can anyone explain why this warning could occur and any workarounds for it ?



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