There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Dynamic Trees BOP (dynamictreesbop)
Caused by: net.minecraftforge.fml.common.LoaderException: java.lang.NoClassDefFoundError: com/ferreusveritas/dynamictrees/api/treedata/ILeavesProperties
at net.minecraftforge.fml.common.AutomaticEventSubscriber.inject(AutomaticEventSubscriber.java:89)
at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:584)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)

Upgrade to the latest version of Dynamic Trees 0.7.5c and remove any older versions of Dynamic Trees.

It's updated to that, still getting those crashes.

Please send a list of all mods you are using and their versions. A screenshot of the mods directory would be fine.

let me test something, i think theres a issue with toughasnails

here was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Dynamic Trees BOP (dynamictreesbop)
Caused by: net.minecraftforge.fml.common.LoaderException: java.lang.NoClassDefFoundError: com/ferreusveritas/dynamictrees/api/treedata/ILeavesProperties
at net.minecraftforge.fml.common.AutomaticEventSubscriber.inject(AutomaticEventSubscriber.java:89)
at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:584)
at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
at com.google.common.eventbus.EventBus.post(EventBus.java:217)
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:278)
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:256)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
at com.google.common.eventbus.EventBus.post(EventBus.java:217)
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:148)
at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:568)
at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:231)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.NoClassDefFoundError: com/ferreusveritas/dynamictrees/api/treedata/ILeavesProperties
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetPublicMethods(Unknown Source)
at java.lang.Class.getMethods(Unknown Source)
at net.minecraftforge.fml.common.eventhandler.EventBus.register(EventBus.java:81)
at net.minecraftforge.fml.common.AutomaticEventSubscriber.inject(AutomaticEventSubscriber.java:82)
... 36 more
Caused by: java.lang.ClassNotFoundException: com.ferreusveritas.dynamictrees.api.treedata.ILeavesProperties
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 42 more
Caused by: net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerException: Exception in class transformer toughasnails.asm.transformer.CropDecayTransformer@32f45e15 from coremod TANLoadingPlugin
at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:262)
at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:279)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:176)
... 44 more
Caused by: java.lang.NullPointerException
at org.objectweb.asm.ClassReader.(Unknown Source)
at toughasnails.asm.transformer.CropDecayTransformer.transform(CropDecayTransformer.java:50)
at net.minecraftforge.fml.common.asm.ASMTransformerWrapper$TransformerWrapper.transform(ASMTransformerWrapper.java:258)

as you notice it does say its an issue with toughasnails and this mod. atleast what i read from it, but then again i might be mistaken.

Is there a reason why you're not fulfilling my request?

Nope, im saying its gonne be a hell of a job, considering its about 170 mods in there :) im uploading the stuff now.

https://imgur.com/a/tw756

Sorry to put you through that but I had to be sure. I don't know you from Sam and I've had users swear they upgraded and did something weird instead. The crash message heavily implies that the Dynamic Trees mod isn't installed at all or is an old version before the ILeavesProperties was implemented by the API. Your screenshot shows that everything should be in working order. This crash shouldn't be possible given that the only caller for Dynamic Trees API is currently the Dynamic Trees BoP add-on and it requires a version with ILeavesProperties. You aren't by chance running the wrong launcher are you?

which launcher am i suppose to use? considering that it is my own private pack....

What I mean is that you may have multiple forge installations for different versions or setups and you mistakenly placed a mod in the wrong folder. I suspect you are updating the mods in one folder and then launching a forge version for another set of mods and getting a crash message for something totally unrelated.

Any luck?

Assuming resolved