Unit won't save into global variable

[Titanhex]

I've been trying to get a unit to save into a global variable and am now stumped on why it won't do it. I've got a GUI version and a JASS version and neither work.

What I'm trying to do:
When a hero takes his current egg item to an incubator building with a skill in it, he can select that building's spell and use it on himself. It then detects if he's carrying a certain item, and turns it into a creature for him while deleting the item. The creature is then stored into a variable under the last created unit or in JASS form, unit U. The tamer is stored as the target unit of the incubate skill.

The Problem:
When I try to order the Creature around through the variable he's stored under, he does not respond. I can only assume that the beast is not being stored into the variable. Any help is appreciated.

Here it is the JASS version:

function Trig_Incubate_Frog2_Conditions takes nothing returns boolean
    if GetSpellAbilityId() == 'Incu' and UnitHasItemOfTypeBJ(GetSpellTargetUnit(), 'SpaE') then
        return true
    endif
    return false
endfunction

function Trig_Incubate_Frog2_Actions takes nothing returns nothing
    local unit u
    call UnitRemoveItemSwapped( GetItemOfTypeFromUnitBJ(GetSpellTargetUnit(), 'SpaE'), GetSpellTargetUnit() )
    call RemoveItem( GetLastRemovedItem() )
    set u = CreateUnitAtLoc(GetOwningPlayer(GetSpellTargetUnit()), 'MurR', GetUnitLoc(GetTriggerUnit()), bj_UNIT_FACING )
    set udg_CurrentBeast[GetConvertedPlayerId(GetOwningPlayer(GetSpellTargetUnit()))] = u
    set udg_Tamer[GetConvertedPlayerId(GetOwningPlayer(GetSpellTargetUnit()))] = GetSpellTargetUnit()
    call IssueTargetOrder( u, "move", GetSpellTargetUnit() )
    set u = null
endfunction

//===========================================================================
function InitTrig_Incubate_Frog2 takes nothing returns nothing
    set gg_trg_Incubate_Frog2 = CreateTrigger(  )
    call TriggerRegisterAnyUnitEventBJ( gg_trg_Incubate_Frog2, EVENT_PLAYER_UNIT_SPELL_EFFECT )
    call TriggerAddCondition( gg_trg_Incubate_Frog2, Condition( function Trig_Incubate_Frog2_Conditions ) )
    call TriggerAddAction( gg_trg_Incubate_Frog2, function Trig_Incubate_Frog2_Actions )
endfunction

And here is the GUI:

• Incubate Frog
  • Events
    • Unit - A unit Starts the effect of an ability
  • Conditions
    • (Ability being cast) Equal to Incubate
    • ((Target unit of ability being cast) has an item of type |cff6495edMurmur Frog |rSpawn) Equal to True
  • Actions
    • Hero - Drop (Item carried by (Target unit of ability being cast) of type |cff6495edMurmur Frog |rSpawn) from (Target unit of ability being cast)
    • Item - Remove (Last dropped item)
    • Unit - Create 1 Murmur Frog for (Owner of (Target unit of ability being cast)) at (Position of (Triggering unit)) facing Default building facing degrees
    • Set CurrentBeast[(Player number of (Owner of (Last created unit)))] = (Last created unit)
    • Set Tamer[(Player number of (Owner of (Target unit of ability being cast)))] = (Target unit of ability being cast)
    • Unit - Order (Last created unit) to Follow (Target unit of ability being cast)

Neither work. Though the Beast following the Tamer does work. Incase it runs deeper than the set up and it's something else causing the issue, I've attached the map for further investigation.

Help is appreciated!

 

[Titanhex]

~Bump~

Fixed up my post a little so it's easy to understand the problem. Also added the map incase it's something else within the map causing the problem.

Thanks for the help! This problem is keeping me from working on certain aspects of my map any further, as it's an important part.