Error Initializing Opera Mail Reading index.ini failed v12.17
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Deleted User last edited byYes index.ini is in that mail folder as listed there. 
 How can one change which folder, just in case?
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Deleted User last edited byYes both accounts.ini and omailbase.dat are there. I've already tried a reinstall alone 
 and also with update from 12.16 to 12.17.
 If I not mistaken I also tried uninstall and reinstall
 instead of reinstall on top of existing only.I did have brief moment of quirk with greyed out options 
 appearing after I switched a backup version of index.ini
 but it seemed like two windows of Opera opened and the one
 with the startup option to start from previous session was picked
 which then the error came up and I was not able to use the
 "ungreyed-out" option nor simulate that again. I am not really sure
 what allowed that quirk to come through but it encourages me that
 there is a solution, which we may be close...
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Deleted User last edited byTried deleting sessions folder, no fix. 
 Yes, settings can be changed and kept after closing Opera
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leocg Moderator Volunteer last edited byYes, settings can be changed and kept after closing Opera Ok, so it doesn't seems to be a problem of reading/writing in the profile folder. Could you try the following? - Open opera:config and look for "Mail Root Directory"
- Change the path (add a letter or number after Mail)
- Close Opera
- Copy the contents of the original mail folder to the new one
- Restart Opera
 
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Deleted User last edited by"Could you try the following? Open opera:config and look for "Mail Root Directory" 
 Change the path (add a letter or number after Mail) Close Opera
 Copy the contents of the original mail folder to the new one Restart Opera"Yes. Thanks. Tried that... 
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Deleted User last edited byNo fix but new error (sorry forgot to put new error message...): Error While Initializing Mail There was a problem initializing Opera Mail. The following file appears to be in use by another application: 
 [C:...(the Path to mail folder and)...\omailbase.dat]To retry, please close the application that uses that file or restart your system. -- 
 So not sure why that error.
 I also have Opera 21 installed. But the previous error problem existed
 before installing Opera 21 (which is installed in another folder in program files).
 I am willing to uninstall Opera 21 if that may be the conflict corresponding with that error.However, I noticed new quirk that after closing Opera 12.17...sometimes it seems like 
 unfinished closing processes (invisible in background) continue for a decent amount of time,
 because after clicking Opera 12.17 to start again after recent closure, a prompt came up
 asking if I wanted to "force start" Opera because it was not finished "closing"...hmm...
 Thanks for your ongoing patience and ideas.
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leocg Moderator Volunteer last edited byI noticed new quirk that after closing Opera 12.17...sometimes it seems like 
 unfinished closing processes (invisible in background) continue for a decent amount of timeOpera needs to save/update some stuff and it's usually done after Opera is closed. However it should not take so long. 
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Deleted User last edited byRight, it should not take so long. 
 I thought this happened after about 30-45 seconds or so give or take...
 I was not counting because I was not expecting that message to pop up.
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Deleted User last edited bySo about that prompt asking to choose to "force start" Opera 
 because it was not finished "closing"...
 That message now seems to occur after minutes and or
 an hour after closing, so finally I force start in order to open browser.
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burnout426 Volunteer last edited bySometimes problems with operaprefs.ini can cause these mail errors too. While Opera is closed, you could rename operaprefs.ini in the profile folder (and put the mail folder back to where it's supposed to be).