One of my users sent error report that the installer has crashed with following error: <blockquote> Runtime error (at 34:1346): Type Mismatch </blockquote> The installer uses Inno Setup. The investigation showed that the bug caused error has been contained in installer.iss. Where can error be located if I know "34:1346" ?

That error location is in the compiled bytecode of your script and as such is pretty much impossible to track back to a line of code. If they can reproduce it, they should launch your installer with <code>/log=filename</code> command line option and you can take a look into such file.