You can open the Installation Log to see (commonly in the end of the log) the error messages, they would mention a file where it had issues doing things.
Corrupted dlclist.xml file (due to unclosed comments or missing lines/characters)
Recently some users had "installation error" message when installing OIV files of some mods, that issue can be related to comments made in dlclist.xml file using tools like the one that goes in a "addon peds selector" mod. To fix this issue you should remove all lines that have comments, lines like this:To fix it, in OpenIV, click in "Edit Mode" to enable edit mode then navigate to mods/update/update.rpf/common/data, right click the file dlclist.xml and click in Edit, find and remove the lines that are comments, they start with , then click in Save
Also make sure that the end of the dlclist.xml file is correct, it should end with those lines:
Also pay attention to the items, each must end with a , example:
Admin/user rights
Some users also had issues due to the fact they couldn't overwrite some files because they was created/owned by other user account in a previous setup of the mod, the solution is delete (or rename) the mod files folder in gta Scripts folder, each mod have a folder in gta Scripts folder, Superman v2.2 for example have the folder "Superman V2 script files"
Case you can't fix your OIV setup issues, email me the installation log: [email protected]