Iguana crashes on replacing tools(second component)

[powerblo]

Whenever I replace the second tool of a mattock, for instance, the game crashes the second I place the item in the slot. I saw there was a similar error below, but the crash log is different, and disabling Tinker's Modifiers didn't work for me.
Here is the crash log;
crash-2015-12-21_19.41.25-client.txt

[powerblo]

This is what happened when I tried to replace my copper pick head/ stone bind/ wooden tool rod pickaxe with a copper tool rod. I hope you can fix this problem quick enough, so I can modify my tools at will. Thanks in advance. :D
crash-2015-12-21_19.59.35-client.txt

[bonii-xx]

Your Crashreport crashed. Good luck finding out what actually caused the crash. :I

[IRVL1998]

crash-2016-01-04_20.58.21-client.txt
This happened after I broke the block tool in Tinkers with Iguanas Tweaks

[NateDog965]

crash-2016-01-31_00.31.43-client.txt
The pack i'm currently am making is using this mod but i have found a problem. This problem is only having affects on the pics when trying to upgrade from copper to iron pic heads, i don't know if this is something their is a fix for already but i wanted to bring this to the attention of the creators of the mod so they know about it and so they or some one else that might know how to fix this to send me a message.

[UnderMybrella]

You're running an old version of Tinkers' Modifiers NateDog965. v1.2.2 should fix it.

[tkddn204]

It's ArrayIndexOutOfBoundsException. This 343 line part :
int[] keyPair = tags.getIntArray("Redstone");
The problem seems to be that "keyPair" is in a null state.
So I think I'd like to put a line of code below that code.
if(!keyPair.equals(null)) {
to line 353

And, the reapplyAttack function below is similar.(line 378~387)
I hope I changed this too... Maybe it can be wrong.
I just told my opinion. Do not have to think too deeply.