Ever Seen This Error??

[Hoodini]

I play with Fetish UI, & I have the latest version installed. I've been using it for weeks now, w/o any errors... Last nite after the raid, I was switching toons & seen this error. Its crazy too, becuz i have EQ installed in the default directory locations. I did a full file scan, & rebooted several times. Well anyways...here goes. Hope to get help on this one... Even GOOGLE'd it w/o any results.

d:\live\eq2\game\client\src\NCS2.cpp(1869):missing required window: NCS Slideshow