Bug report #16449

Mapinfo file gets corrupted when table is edited

Added by Pedro Camargo almost 7 years ago. Updated about 5 years ago.

Affected QGIS version:2.18.5 Regression?:No
Operating System: Easy fix?:No
Pull Request or Patch supplied:No Resolution:end of life
Crashes QGIS or corrupts data:Yes Copied to github as #:24358


When one edits the table of a Mapinfo *TAB file (say deleting a field), the whole layer disappears (as in not records in the table or features in the map).

When trying to save the file, a *.DAT.tmp is created, but never converted to *.DAT. If we rename the files (adjusting their extensions), we get an error: "OGR3 error 7: Unsupported field type!" , which leads me to conclude that writing the table down is not being done until the end.

example_tab.7z (438 KB) Pedro Camargo, 2017-04-27 04:18 PM


#1 Updated by Even Rouault almost 7 years ago

I assume this is on Windows ? If so, this must be an issue similar to the one we had with shapefiles where renaming doesn't work due to some Windows component keeping a file handle opened on the original .dat file preventing the .dat.tmp from being renamed as .dat

#2 Updated by Pedro Camargo almost 7 years ago

Yes, windows 10
Files attached (before and after corruption)
GDAL version 2.1.3
When you edit the table (adding or deleting fields, for example), things go smoothly until you try to commit the changes. When you do that, youget a message that you cannot commit those changes. After that, when you ask to roll back, you cannot open the file in Mapinfo (says it is corrupted) and QGIS opens just an empty table when you that the said layer.

error report when deleting fields:

2017-04-28T09:19:36 0 QGIS Ready!
2017-04-28T09:21:32 1 Commit errors:
ERROR: 2 attribute(s) not deleted.

Provider errors:
OGR error deleting field 5: WriteBytes(): Attempt to write past end of data block.
2017-04-28T09:21:34 1 Commit errors:
ERROR: 2 attribute(s) not deleted.
Provider errors:
OGR error deleting field 6: Invalid field index
OGR error deleting field 5: WriteBytes(): Attempt to write past end of data block.

#3 Updated by Giovanni Manghi almost 7 years ago

  • Easy fix? set to No
  • Regression? set to No

#4 Updated by Giovanni Manghi almost 7 years ago

  • Description updated (diff)
  • Crashes QGIS or corrupts data changed from No to Yes
  • Category set to Vectors

#5 Updated by Giovanni Manghi about 5 years ago

  • Resolution set to end of life
  • Status changed from Open to Closed

End of life notice: QGIS 2.18 LTR


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