Question

I have written an application in Inno Setup to install files on users PCs. The application works well when I test it on XP in Parallels running on Mac. But when the user tries to install, in Xp and in 7, they get to the Wizard and start the install and then get the message:

Error. The drive or UNC share you selected does not exist or is not accessible

I have now managed to get the log file that the program produces:

2012-11-11 14:09:21.992   Log opened. (Time zone: UTC+00:00)

2012-11-11 14:09:21.992   Setup version: Inno Setup version 5.5.2 (a)

2012-11-11 14:09:21.992   Original Setup EXE: C:\Users\Ali\Documents\rninstaller.exe

2012-11-11 14:09:21.992   Setup command line: /SL5="$9049C,86159698,54272,C:\Users\Ali\Documents\rninstaller.exe" /SPAWNWND=$D049A /NOTIFYWND=$140476 /log="rnlog"

2012-11-11 14:09:21.992   Windows version: 6.1.7601 SP1  (NT platform: Yes)

2012-11-11 14:09:21.992   64-bit Windows: Yes

2012-11-11 14:09:21.992   Processor architecture: x64

2012-11-11 14:09:21.992   User privileges: Administrative

2012-11-11 14:09:21.992   64-bit install mode: No

2012-11-11 14:09:21.992   Created temporary directory: C:\Users\Ali\AppData\Local\Temp\is-MQ2FF.tmp

2012-11-11 14:09:28.201   RestartManager found an application using one of our files: ?O?O?O?I?O?O?O?I?O?O?O?O?O?O?O?O?O?O?O?O?O?O?O?O?O?O?O?ODO?O?O?O?O?I?I?I?I?I?I?I?I?I?I?I?I?I?I?I?I?I?I?I?I?I?I?I?I?I?O?O?O?O?O?O?O?O?O?I?I?i

2012-11-11 14:09:28.201   RestartManager found an application using one of our files: 

2012-11-11 14:09:28.201   RestartManager found an application using one of our files: 

2012-11-11 14:09:28.201   RestartManager found an application using one of our files: 

2012-11-11 14:09:28.201   RestartManager found an application using one of our files: 

2012-11-11 14:09:28.201   Can use RestartManager to avoid reboot? No (262758)

2012-11-11 14:09:28.201   Message box (OK):
                          The drive or UNC share you selected does not exist or is not accessible. Please select another.

2012-11-11 14:09:31.592   User chose OK.

2012-11-11 14:09:31.592   Deinitializing Setup.

2012-11-11 14:09:31.592   Log closed.

I cannot see what is going on here. Can anyone help ?

Answer 1

As resolved in the comments to the question, the setup script in the question had a hard coded DefaultDirName which consisted of a server name that didn’t existed at the client site. This resulted in the “The drive or UNC share you selected does not exist or is not accessible” error. This is why DefaultDirName, most often, “is prefixed by a directory constant”.