On 31 Mar 2016, at 04:55, Mariano Martinez Peck <marianopeck@gmail.com> wrote:Hi guys,Could someone help me understand what could be the exact reason of a 'Bad argument for external function' in an FFI call? Of course, I double checked all the arguments definitions in the #ffiCall: and the real objects I receive as arguments at the moment of the callout. And they all seem correct.And even better...how can I get more info about it?