[Closed] Two skinOps.ReplaceVertexWeights in a row ?

haha found. Thanks everyone.

Understood what was wrong but then I am back to another problem I wanted to avoid :

For vert = 1 to AllVerts do
(
–Empty Arrays
BoneArray = #()
WeightArray = #()
BoneArray2 = #()
WeightArray2 = #()
– Get number of bones per verts
MyBonesPerVert = skinOps.GetVertexWeightCount MyObject.modifiers[#skin] vert

for Mybone = 1 to MyBonesPerVert do
				(		
					-- get bones index and weights 
					BoneIndex =	skinOps.GetVertexWeightBoneID MyObject.modifiers[#skin] vert Mybone
					
					BoneWeight = skinOps.GetVertexWeight MyObject.modifiers[#skin] vert Mybone
					
					--iif this bone index is  == to the stored  MySelectedFromBoneIndex	then swap
					if BoneIndex == MySelectedFromBoneIndex do
					(														
					 BoneIndex = MySelectedToBoneIndex					
					)				
					Append BoneArray BoneIndex
					Append WeightArray BoneWeight						
				)
				
				
				--1 Swap Bones				
				skinOps.ReplaceVertexWeights MyObject.modifiers[#skin] vert BoneArray WeightArray
				--///////2ND LOOP///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
				for Mybone = 1 to MyBonesPerVert do
				(						
					-- get bones index and weights 
					BoneIndex2 =	skinOps.GetVertexWeightBoneID MyObject.modifiers[#skin] vert Mybone
					
					BoneWeight2 = skinOps.GetVertexWeight MyObject.modifiers[#skin] vert Mybone
				
					--iif this bone index is  == to the stored  MySelectedFromBoneIndex	then swap
					if BoneIndex2 == MySelectedFromBoneIndex2 do
					(														
						BoneIndex2 = MySelectedToBoneIndex2					
					)				
					Append BoneArray2 BoneIndex2
					Append WeightArray2 BoneWeight2	
				)					
				--2 Swap Bones
				skinOps.ReplaceVertexWeights MyObject.modifiers[#skin] vert BoneArray2 WeightArray2	

)

As you can see I have two loops one after the other. Both are almost identical, if I put one in comment the other one left will works. Both together they just empty all my weights and I simply can’t figure out why. Is anyone have an idea ?

Thank you !
Blob

where do MySelectedFromBoneIndex, MySelectedFromBoneIndex2 & MySelectedToBoneIndex & MySelectedToBoneIndex2 initally get defined?

In the struct above. But no problem in this area. As I was saying, individually each loop is working fine, the swapping occurs with no problems at all. The issue comes when I want to do a second loop after the first.
There is something that makes the two loops interfering each others and I cannot see what.

Thanks
Blob