[ravintag]

Hi,
When an Order Bundling is done then the application should have built shipments on various basis like time from each stop / time taken at xdock / handling points and delivery time, etc.. When you are unassigning one Order Release from this bundle the application has to internally unassign all the releases in the bundle and rebuild the shipments and in this rebuilding process the bulk plan may be facing difficulty to bundle the remaining releases together. I think that could be the reason for the error message.

I am not sure if this helps you but I have experienced sometimes the similar way and when you select all the releases of the bundle and unassign then you will not get any error.