Purple Flash; the enchant has no effect!

Hi:
When a weap/armour flashes purple and there is no effect, does that mean the weap/armour can't be enchanted anymore? Or does this simply mean that you can't enchant anything more to it that day!?
Slainte...
Scorchas.
When a weap/armour flashes purple and there is no effect, does that mean the weap/armour can't be enchanted anymore? Or does this simply mean that you can't enchant anything more to it that day!?
Slainte...
Scorchas.