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Nope nothing was printed on the console. It is strange as the command lines doesnt work either, so something is up ( maybe its my windows or something ). A temporarily solution could be if i included the files in the installation program manually, but since im making this dynamic and customizeable i need to know if these files are the same for each version of forge or if they are changed for each forge version ? EDIT: Hmm.. Do you know of any parameters i can parse to minecraft that checks if all files are there ? Currently im using these parameters : "-Dfml.ignorePatchDiscrepancies=true -Dfml.ignoreInvalidMinecraftCertificates=true" but maybe i need to write one that checks if those needed files are there..

Tried it from command line without any options, both the 848 and 871 builds, but it wont work. The vanlila launcher still downloads some files Its actually not a problem that those files are downloaded, the problem is that magic launcher doesnt do this by it self ..

Yeah i've tried running the forge installer from the command line, but im having some trouble with that too actually.. Nothing happens when i try the command line switches from the wiki: Am i doing that wrong ? But the launcher wrapper and lzma libraries are downloading if i use the vanilla launcher .. Its just not working with magic launcher, so i guess its magic launcher that doesnt support this. If i just run the vanilla launcher after i have installed forge, once it works fine with magic launcher afterwards.. Maybe i should try contacting the devs of Magic Launcher.. But from what you are telling me. those files should be installed with the forge installer, and not downloaded on first run?

This might have something to do with the problem.. I tried monitoring the .minecraft folder when launching the game in different ways to study what was happening .. Heres the result: Launching Minecraft 1.6.2 without Forge Launching Minecraft 1.6.2 with Forge (with Magic Launcher) Launching Minecraft 1.6.2 with Forge (normal minecraft launcher) As seen there something is created with the normal launcher which is not being done with magic launcher. It might not be forge that is doing it, but the normal minecraft launcher it self.

Here is what i do. At this time minecraft is not installed. Im using Minecraft 1.6.2 and forge 9.10.0.848 or 9.10.0.871, doesnt rellay matter. 1. Download the minecraft launcher 2. Launch it and logon. 3. Edit the current profile to match the minecraft version i want to play. 4. Launch Minecraft to check that it works. Quit it again. 5. Run the forge installer 9.10.0.848. 6. Install some mods and configs and configure Magic Launcher. 7. Try to launch the game with Magic Launcher. Get following error: 8. Quit magic launcher and start up the original minecraft launcher 9. Edit profile again to use installed forge 10. Launch game with original Minecraft Launcher. Works fine. 11. Close game down again, and retry the launch with Magic Launcher 12. This time it works without problems, and without editing the profile in magic launcher. Do you have any idea what might go wrong ?

Hmm that is wierd. Since what version ? As im trying with build 8xx and if i install minecraft right away, and use my modinstaller iam unable to launch the game with magic launcher. I have to launch the game at least once with the normal minecraft launcher.. When that has been done magic launcher has no problems, which was why i thought it downloaded some additional files when launched ..

Hello Im in the middle of developing a custom modpack installation system, but theres something im not sure about. In my installation program i have a checker that thecks if forge is installed before it can install any mods. Its a simple button you press that launches the forge installation. After forge installation is completed you can continue with the installation of the mods. The program uses magic launcher and generates a profile for it based on the bundled mods. My only problem is that when the installation is complete and i launch magic launcher with the mods it fails to load. If i launch minecraft with the normal launcher first it works fine in magic launcher afterwards. It seems that forge is downloading additional files at minecrafts first run after the install. is that correct? Can i somehow prevent this ? is there a command line i can run to download the needed files after a forge installation without the need to launch minecraft it self ? Thanks !