I've had the same thing happen. For me the error contained the beginning of file path, then KICK SHELL or BUST A MOVE. Something like

C:\Documents\JaKICK SHELL.j2l

except longer. My guess is it can only handle file paths of a certain length and if its too long it may paste the phrase over the end of the path, creating an obviously nonsense path that doesn't correspond to any level that might actually exist. However, this is just a guess, and could be complete nonsense.