When I try to start QGIS 1.8.0 I get the error message "Can't find procedure start address TIFFMergerFieldInfo in libtiff.dll" and the program won't start. I have downloaded and reinstalled QGIS several times, but it does not help. What to do? Any suggestions? I have noticed that this problem is not unique to me, but I have not found a remedy.

  • It's not a QGIS problem. That's why reinstalling doesn't change anything. It's a problem in your system caused by other applications which installed their incompatible DLLs in windows system folders.
    – underdark
    Commented Mar 12, 2013 at 20:28

1 Answer 1


The work-around to this issue is to rename libtiff.dll in your windows\system32 folder, then restart QGIS. You can either:

  • rename the file to something like libtiff.dll.bak, OR
  • rename the file (as above) then copy libtiff.dll from your QGIS install folder to windows\system32

The following links identified this work-around.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.