Not sure if it will work with the out of the box Merge Orders option in Linnworks Desktop? But this typically if the order is from the same person and marketplace then it will merge these orders.
Here is the link to an article Linnworks wrote: https://help.linnworks.com/support/solutions/articles/7000005330-how-can-i-make-linnworks-automatically-merge-orders-
Hopefully won't be long until this feature is in Linnworks.net :)
All the best,
Fitted Commerce - Ecommerce Agency and Linnworks Specialists
The Linnworks User Hub - Facebook Group
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Hitmeister sends separated files for each item ordered but all with the same external order no.
Is there any chance in Linnworks to automate merging these files with same external no. to one single file?