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*E,SOSSZI Slice size for streaming concatenation expression has an illegal value

Jeff000

Hi,

As I attempt to perform stream operation as below,

bit[3:0] v_b[16];

bit[31:0] v_a;

v_a = { << $size(v_b, 2) {v_a}};

It will give the error message "*E,SOSSZI Slice size for streaming concatenation expression has an illegal value".

But if try the following code,

v_a = { << $size(v_b) {v_a}};

It can pass the compilation.

BTW, both of the code above can pass compilation on Questasim.

Anyone can give some explanation?

Thanks.

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