I believe the issue whereby the plugin stops trying to merge items relates to an issue with Zotero itself and the limits on merging items of different types. For instance if one item is a PREPRINT and the second is a JOURNAL ARTICLE, Zotero can't merge them and therefore your plugin can't. I merged most of 3500 items by watching what was happening and if I hit a group that Zotero views as not of the same type, I selected another area in the duplicates window and the merging continued.
Not sure if it's possible, but maybe have a check for if the items are of the same type and if not skip and move to the next set of items?
Feel free to reach out and I can walk you through it more if you care.
I believe the issue whereby the plugin stops trying to merge items relates to an issue with Zotero itself and the limits on merging items of different types. For instance if one item is a PREPRINT and the second is a JOURNAL ARTICLE, Zotero can't merge them and therefore your plugin can't. I merged most of 3500 items by watching what was happening and if I hit a group that Zotero views as not of the same type, I selected another area in the duplicates window and the merging continued.
Not sure if it's possible, but maybe have a check for if the items are of the same type and if not skip and move to the next set of items?
Feel free to reach out and I can walk you through it more if you care.