android - How to access typed data from out Renderscript allocation?

Question

I create typed RS allocations this way:

mRS = RenderScript.create(mContext);
Element.Builder eb = new Element.Builder(mRS);
eb.add(Element.F32_3(mRS), "xyz");
eb.add(Element.F32_2(mRS), "uv");
Element eStride_XYZUV = eb.create();

mInAllocation = Allocation.createSized(mRS, eStride_XYZUV, animLand.getArray().length / 5);
mOutAllocation = Allocation.createSized(mRS, eStride_XYZUV, animLand.getArray().length / 5);

animLand.getArray() is an array of float. I can copy data to input allocation:

mInAllocation.copyFromUnchecked(animLand.getArray());

However, when I try to retrieve data from out allocation this way:

mOutAllocation.copyTo(animLand.getArray());

I get exception:

android.renderscript.RSIllegalArgumentException: 32 bit float source does not match allocation type null

How can I access data from output Allocation with array of my custom Element? There are methods to copy to arrays/bitmaps but only for primitive Element types.

It works if I use primitive F32 type but I would like to use typed data:

mInAllocation = Allocation.createSized(mRS, Element.F32(mRS), animLand.getArray().length);
mOutAllocation = Allocation.createSized(mRS, Element.F32(mRS), animLand.getArray().length);
...
mInAllocation.copyFromUnchecked(animLand.getArray());
...
mOutAllocation.copyTo(animLand.getArray());