On 23/03/14 15:54, Amr Sabry wrote: > Oh I am developing and testing using 2.3.3. --Amr > You can make your module work on 2.3.2.1 simply by changing line 172 to (p₁ ℚ/ p₂) {p} = p₁ ℚ* (ℚR p₂ {p}) and line 24 to normalize {m} {n} {0} {_} {()} _ I'm somewhat surprised 2.3.3 doesn't complain about line 24, I should probably upgrade. -- Mateusz K.