I get this error and I search for it more times but I don't find any causes for it. if I create 2 Use Case without noting, when I link them in 1 direction they link with generalization but when I delete (delete from model) link and draw link in opposite direction it create that error. some reason I found in google but they are not correct for me (delete from model or circular inheritance in not valid) in this case.help me please.
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Usually this solved my problem: - recover the mistake relation, right click it, and choose "Delete from Model" will solve your problem - Ctrl + D
Jason
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