Can you post the whole debug.log here and don't forget to put it inside the "insert code tag" with icon
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I think the reason why you get this error it's because you have corrupted blockchains.
I'd like to suggest is to try manually reindexing the wallet through the terminal.
Use this command below
/Applications/Bitcoin-Qt.app/Contents/MacOS/Bitcoin-Qt -reindex
Let see if it will work.
hi. thanks for ur reply. i compared it with ordinary successful open log. error started from that. also error message said to reindex as ur suggestion. will i redownload the whole blockchain if i reindex...??