luziferjones 0 Report post Posted December 6, 2018 Hey, I couldn't install Forge with the windows installer, so I asked google about it. I found a solution that helped most of the people: http://www.minecraftforge.net/forum/topic/52285-forge-installation-issues/?do=findComment&comment=255402 If I open up the command prompt and type the command in i get the error message: Mainclass .net.preferIPv4Stack=true could not be found or loaded. Can anyone tell me how to fix this? PS: I renamed the installer to forge.jar, just so u dont wonder. Share this post Link to post Share on other sites
diesieben07 6116 Report post Posted December 6, 2018 When using PowerShell complex arguments must be quoted: java "-Djava.net.preferIPv4Stack=true" -jar .\forge-1.12.2-14.23.5.2795-installer.jar 1 Share this post Link to post Share on other sites
luziferjones 0 Report post Posted December 6, 2018 Thanks for the quick response. Now I have another error I guess, as seen in the picture. Do you know what to do? Sorry for beeing that clueless^^ Share this post Link to post Share on other sites
Cadiboo 148 Report post Posted December 6, 2018 Please post the full output, your screenshot is missing the class that wasn't found 1 Share this post Link to post Share on other sites
luziferjones 0 Report post Posted December 6, 2018 Here it is. Share this post Link to post Share on other sites
diesieben07 6116 Report post Posted December 6, 2018 That is not the Forge installer. That is the universal jar. Download the Installer from here: http://files.minecraftforge.net/. 1 Share this post Link to post Share on other sites
luziferjones 0 Report post Posted December 6, 2018 Ahh god dammit, I seem to have missclicked at the downloadsection. My bad, sorry...^^ Thanks for your answers. Share this post Link to post Share on other sites
