Solution .45 is a metal supergroup from Sweden, created by guitarist Jani Stefanovic (Miseration, Divinefire, Essence of Sorrow). In late 2007 Jani Stefanovic formed Solution .45, with Christian Älvestam (who had left Scar Symmetry in 2008) joining as one of its last members. Jani stresses that despite Christian's presence in the band, it will not be a Scar Symmetry clone and that songs had been ready for some time before his arrival.In the fall of 2008 an 8-track demo was produced by Tomas "Plec" Johansson (Unmoored, Scar Symmetry), with a demo track titled "Clandestinity Now".
Solution .45 entered Panic Room Studios in September 2009 to record its first full-length album For Aeons Past, with Dark Tranquillity vocalist Mikael Stanne writing lyrics for the majority of the album. The record was finished and mastered in December 2009 and was issued by AFM records in Europe and Marquee/Avalon in Japan.
On 23 January 2010, it was announced that the band was parting ways with keyboardist Mikko Härkin. Mikko still contributed keyboards to the record, but he is regarded as a guest musician on the album, rather than a permanent band member. Furthermore, it was announced on 29 May 2010 that Jani Stefanovic was leaving the band amicably, and Patrik Gardberg (from Torchbearer, The Few Against Many, and Ammotrack) would be his replacement. The band still wishes to involve Jani in future work, including future albums.
On 11 August 2011, it was announced that Stefanovic had returned to the band, which would now feature three guitarists (Stefanovic, Gardiner, and Gardberg). It has since been announced that Anders Edlund, the groups bassist, has departed from the group on mutual terms.
As of mid-2014, the group is working on their second and third studio albums. On 9 July 2014, the band announced that Tom Gardiner had left the band. On August 31st 2015, on the official facebook page, the band announced November 20th 2015 as the release date of Part 1 of their new album, which will be released worldwide through vinyl, CD and most digital platforms. The album was later titled "Nightmares In The Waking State: Part I."