user23006: While my Bitcoin-Qt was synchronizing, I ran into the following error:
It first loaded full blocks from blk00000.dat to blk00217.dat file (with file size about 131 MB per file). Then Bitcoin-Qt indexed everything from rev00000.dat to rev00214 (with file size about 17 MB per file), but skipped rev00215 and rev00216, and just created rev00217.
Now Bitcoin-Qt is stuck synchronizing with network but doesn't load more block. The block number is constant.
I ran Bitcoin-Qt for 9 more days. I want to keep all index data completed (to blk00214) and continue reindex from right before where the error occurred (blk00215), rather than restarting from the beginning. Is there a way to reindex from a certain point?
Please help!

user18196: Unfortunately, I don't believe the -reindex option has the ability to be that smart. 
If I were you, I would:

Shutdown Bitcoin-Qt
Start Bitcoin-QT with the -reindex flag

Reindexing doesn't take very long usually (maybe a few hours). 9 days is a long time to wait, it would probably be better to just start with a clean reindex. This won't delete the blkxxxxx.dat files, so you won't have to download all that data again at least.

23006: <p>While my Bitcoin-Qt was synchronizing, I ran into the following error:</p>

<p>It first loaded full blocks from blk00000.dat to blk00217.dat file (with file size about 131 MB per file). Then Bitcoin-Qt indexed everything from rev00000.dat to rev00214 (with file size about 17 MB per file), but skipped rev00215 and rev00216, and just created rev00217.</p>

<p>Now Bitcoin-Qt is stuck synchronizing with network but doesn't load more block. The block number is constant.</p>

<p>I ran Bitcoin-Qt for 9 more days. I want to keep all index data completed (to blk00214) and continue reindex from right before where the error occurred (blk00215), rather than restarting from the beginning. <strong>Is there a way to reindex from a certain point?</strong></p>

<p>Please help!</p>
 18196: <p>Unfortunately, I don't believe the <code>-reindex</code> option has the ability to be that smart. </p>

<p>If I were you, I would:</p>

<ol>
<li>Shutdown Bitcoin-Qt</li>
<li>Start Bitcoin-QT with the <code>-reindex</code> flag</li>
</ol>

<p>Reindexing doesn't take very long usually (maybe a few hours). 9 days is a long time to wait, it would probably be better to just start with a clean reindex. This won't delete the <code>blkxxxxx.dat</code> files, so you won't have to download all that data again at least.</p>
