I have all parts of the Aether 1.7.3 installed (Aether, ShockAhPI, PlayerAPI, SPC, ModLoader, AudioMod) and this is the error I get on running. The versions are correct.
Thanks for any help!
Client> Aug 25, 2013 8:02:23 PM net.minecraft.launchwrapper.LogWrapper log
Client> INFO: Using tweak class name net.minecraft.launchwrapper.VanillaTweaker
Client> Aug 25, 2013 8:02:23 PM net.minecraft.launchwrapper.LogWrapper log
Client> INFO: Launching wrapped minecraft
Client> Using ShockAhPI r5.1
Client> 16 achievements
Client> 151 recipes
Client> Turning of ImageIO disk-caching
Client> Loading current icons for window from: C:\Users\Luke\AppData\Roaming\.minecraft\assets\icons\icon_16x16.png and C:\Users\Luke\AppData\Roaming\.minecraft\assets\icons\icon_32x32.png
Client> Setting gameDir to: C:\Users\Luke\AppData\Roaming\.fishProject
Client> ModLoader Beta 1.7.3 Initializing...
Client> Exception in thread "Minecraft main thread" java.lang.ExceptionInInitializerError
Client> at net.minecraft.client.Minecraft.a(SourceFile:318)
Client> at net.minecraft.client.Minecraft.run(SourceFile:716)
Client> at java.lang.Thread.run(Unknown Source)
Client> Caused by: java.lang.RuntimeException: java.lang.IllegalArgumentException: URI is not hierarchical
Client> at ModLoader.init(ModLoader.java:838)
Client> at ModLoader.AddAllRenderers(ModLoader.java:183)
Client> at th.<init>(th.java:60)
Client> at th.<clinit>(th.java:9)
Client> ... 3 more
Client> Caused by: java.lang.IllegalArgumentException: URI is not hierarchical
Client> at java.io.File.<init>(Unknown Source)
Client> at ModLoader.init(ModLoader.java:809)
Client> ... 6 more
Thanks for any help!
I understand this thread was made 2 years ago, but you seem to really want help, so here it is:
Try using the Legacy Launcher instead.