Insight UK says it is now on top of "teething problems" related to its ERP upgrade that delayed some customers' orders.
The reseller giant started rolling out the Microsoft Dynamix AX platform internally last year across operations in mainland Europe and has recently gone live in the UK.
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Some customers contacted The Channel to report issues, with one claiming system glitches "resulted in lost orders, wrong orders and pricing issues".
He said it had been sitting on returns for some weeks and products were not being packaged correctly, which has led to more returns.
Stuart Fenton, EMEA president at Insight, said: "We've had a handful of teething problems, a few client orders that didn't go out on next day delivery. But it is a minute volume compared to daily shipments."
He said Insight was now "pretty close to normal operations" in terms of placing orders [with suppliers] and shipping consignments.
"It is perfectly normal for a company like ours to put in a new ERP system that gives us a world class platform which positions us for the future.
"It provides us with better platform for project management as well as cloud and mobile services," he said. ®