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Though late but I think there is trivial misunderstanding of terminology.
It looks like Modelsim means by decimal as signed (without decimal point), unsigned as unsigned(without decimal point) and fixed point for binary with decimal point defintion. Thus your above
value is viewed without decimal point unless you choose fixed point. For signed/unsigned it ignores decimal point entered for fixed point.
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I'm sorry, but please read through my previous posts more carefully.
For every even bit length <64 it works. Given the fact that I also have 15+ year experience in programming I can easily say that this is a bug. Classical index out of bounds error.
Regarding decimal, that is how it's presented in the wave window. Signed/unsigned doesn't matter at all.
This is already concluded to be a bug in the Xilinx forum. Thanks for your interest though.
Honored Contributor
