Catelog problems


i have installed lightroom 5 upgrade. when try open following message

"the lightroom catelog named "lightroom 4 catelog" cannot opened because application has opened. quit other application before trying launch it.

i have nothing else open.

how past problem?

when lightroom open creates file extention .lock (lock) in same name of catalog in use. default these catalogs extention .lrcat (lrcat) in folder located under user name  "your user name> pictures> lightroom> "  when lightroom closed normaly (lock) file automatically discarded (deleted). if reason lightroom not close (lock) file remain in place preventing use of catalog.

solution, lightroom closed (both lr4 , lr5) go "your user name> pictures> lightroom" sub folder , if there (lock) file present detete file.

then restart lr5 , see if can complete process of upgrading lr 4 catalog.



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