ConvergenceError

exception ConvergenceError

Raised when synthesis ran to completion without reaching tolerance_error.

The search grew its ansatz to the bound it was given and no size along the way came within the requested error. That is an ordinary outcome of an approximate search asked for more accuracy than it found, not a fault in the backend. More trials often clear it before a larger bound does, since each size gets more than one starting point to converge from.