HI, Danish man who needs help. I cant find anything about this problem, when you have a Windows 7. My LR 4 tells me, when I try to open the program, that a have a "assertion failed" and over this info box, there are this black toolbar, with the words: "Opening Catalog: Lidt Af Hvert ....LRCAT. That was the latest Catalog I was creating, BUT I put 3 "..." behind the name, and BOOM, LR failed. Now there are nothing to do... ?? I have installed LR 4 trial again and again. I have Re-started the Pc 3 times. What CAN I DO??? Please help me..
Can anyone contact me in danish??
Try clearing your preference file. Lightroom will rebuild it on startup. You can find the location of the preference file documented here: