OpenNumismat: 1.6.1
OS: Windows 10 (10.0.15063)
Python: 3.4.4 (32bit)
Qt: 5.5.1
Locale: es
Traceback (most recent call last):
File "d:\OpenNumismat\open-numismat\OpenNumismat\Reference\Reference.py", line 39, in data
AttributeError: 'int' object has no attribute 'isNull'