Help! I've used this method of removing ISBN with no problems previously but it is seems that in the last few version updates of Calibre it has stopped working for me. I select the Edit in Bulk and enter the following:
Search Field: #isbn
Search for: .*
all other fields left blank
Problem is that the Test Result shows "You must specify a destination when source is a composite field" and I get the same in an error box if I try to run the search and replace still. Is there a new way to remove ISBNs in bulk?
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