Hello Qeepel,

Thanks for replying.
Since this happened weeks ago I can't give you any details on dates and times anymore.
But I'll try to fill it out for you guys.

ISP: Ziggo (Netherlands)
Type of Internet Connection: Cable
Internet Connection Speed: 120 mbit down / 10 mbit up
Date & Time: weeks ago
Frequency: only happened once
Character Name: Nureak Neiak
Race: Lalafell
World: Gungnir
Class: Conjurer
Physical Level: 25
Area and Coordinates: Uldah, Uldah Mercantile House
Party or Solo: Solo
Retainer Name: Bloesem
In-Game Time: too long ago to remember but if you want to know where the retainer is now, she's in a stall in the Uldahn Mercantile House (see my link in my first post)

A thing to note:
I have two characters playing on this Internet Connection: Kaerun Kaien and Nureak Neiak(I use this character as a mule/secondary character).

What I was doing:
My other character (kaerun Kaien) has been leveling botany, and it seemed to be a good idea to sell it on this characters retainer.
So i did some trading around between Kaerun and Nureak, after that i summoned Bloesem in Uldah, Uldah Mercantile House, traded the items and setup the bazaar.
After that i sent her away to the Woodworkers Row.
Then i checked the NPC if my retainer would show up if I did an item search. (which wasn't the case).
So i tried to summon her again at the bell in the Uldah Mercantile House, then the error happened.