The Lightroom forum would be the specialists on that program, just click on the link. Photoshop Lightroom
The question is kind of general and there can be a lot of causes. To get good results, supply the following to them:
Adobe product and version number
Operating system and version number
The full text of any error message(s)
What you were doing when the problem occurred
Screenshots of the problem
Computer hardware, such as CPU; GPU; amount of RAM; etc.
I shut down the computer and re started now the program works ?????? Thanks for the help.
I'm glad you found the problem. My know-how is basically in Photoshop and Lightroom is different. Bookmark that forum if you have questions, they can help you if anything else shows up.