Many gamers who use non-official versions, but the so-called re-packs (Re-Packs) downloaded from the Internet, sometimes experience crashes in the Unarc.dll dynamic library. This component can return error code 6 in several typical situations. Consider the most common variations of this problem.
Dynamic Unarc.dll component: what does it mean "returned error code 6"?
It is believed that this type of library error, as well as other varieties, is associated with archived data that must be extracted during the unpacking of the installation distribution package from the archive or when installing games, when the installer independently extracts data from self-extracting objects.
In this case, two important components of the system are called - Unarc.dll and ISDone.dll, which interact very closely. All failures caused by these libraries are of the same nature, but messages about them are issued exclusively with reference to the second component.
The Unarc.dll object itself can return error code 6 mainly in situations where it is not possible to unpack an archive with a distribution kit or a set of installation components.
Archive unpacking failures
The main problem in this situation is archive corruption due to the inability to read CRC Check parameters .
This can only mean that the archive itself was not fully downloaded when downloading from the Internet, that is, its integrity is violated. No matter how powerful the decompressor program, it cannot retrieve data from the damaged archive.
Unarc.dll can also return error code 6 in the case when everything is in order with the archive, but when it was created, a more recent version of the archiver itself was used. For example, if the files are packed with WinRAR version 5.3, and the user tries to extract data using the “clean” modification 5, not to mention versions 4 and below, nothing will come of this.
Finally, Unarc.dll can also return error code 6 if the original archiving method originally used additional maximum compression technologies and the unpacking program does not support them.
Problems installing games
In the case when the re-pack is not an archive, this type of error can also occur. This is due to the fact that among the installation components there are self-extracting objects such as SFX (Self-Extracting Archive) files, information from which in most cases is extracted in the very least.
It is not surprising that sometimes the installation can reach 95-99%, the user is already looking forward to playing the game, and instead receives a message stating that Unarc.dll returned an error code 6. How to fix this type of failure? Next, we consider in detail.
Unarc.dll returned error code 6: how to fix?
Correcting the problem you need to start by checking the integrity of the archive, it really can be damaged. The simplest and most logical solution is to download it from another resource. You can give a little advice, although not entirely correct: it is better to use downloading from torrent trackers (in this case, you can be sure that the archive will be downloaded completely and completely). But if the problem is already with the archive itself, you will have to look for a normal intact file.
If the failure is caused solely by the mismatch of the versions of the archivers (usually in this case a message is displayed with the line “decompression failed”), for the correct extraction of data you just need to install the latest version of the archiver program.
Many people advise against using WinRAR utility, and even more so - WinZIP, but prefer 7-Zip. It will solve not only the current problem, but will also help in the case when maximum compression technologies were used.
Rarely, there are still situations where the problem lies in the failed Unarc.dll and ISDone.dll libraries themselves. They can also be damaged, for example, in the case of exposure to viruses or for other reasons. Some try to find original libraries on the Internet and integrate them into their system. Do not do this. This method simply will not work.
For that matter, it is better to use special utilities such as DLL Suite or similar tools that automatically detect the presence of bad libraries in the system without user intervention and then replace these objects with the original ones (find them in your own database or download from the Internet for systems in which have the latest service packs installed). After that, the message that Unars.dll returned error code 6 will no longer appear (if the problem really was related to these components).
A few words in the end
Viruses and protection against them were not discussed, since for any user understanding security issues is a matter of course. In general, by and large, you should not use amateur re-packs, it is better to give preference to official game sets and additions to them. Only in this case, with full compliance of the hardware with the system requirements of the game, you can be one hundred percent sure that the game will be installed correctly and will not fail in the future.