The Repair Index Files tool in Drake is very helpful when it comes to solving the issue of some returns which become uneditable or missing some entries in general or after recovering/retrieving certain returns.
To use the tool, go to Tools > Repair Index Files
Leave Repair All selected, then click Continue
Quick Index - Repair current name index is selected by default. You can proceed with the Quick Index or one of the other two options, depending on the situation. Then click OK.
In the results window, you'll see Repair Complete and how many records were affected.
