More precisely the values passed on to

Mesh_Hash_UV

are FP_POS_DNORM which probably points to some uninitialized variable problem.
Unfortunately I cannot track that down.
So instead of rounding to the nearest integer, I check the fp_class and when it is
DNORM then I arbitrarily set it to 0.0;
if ( fp_class(P[U])  < 8 ) P[U] = 0.0; if ( fp_class(P[V])  < 8 ) P[V] = 0.0;
This works perfectly so far.

Any other ideas ?

Lothar

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