Quick Bit Of Advice Please! iPhoto Library Corrupt?

[BenEndeem]

Last time I used iPhoto it wouldn't quit and I had to Force Quit, however on trying to use it again now I'm getting an error message.

Apparently the library is locked or I don't have access despite using the one and only account on my Mac.

Any advice or troubleshooting would be great please.

 

[cMacSW]

Have you tried rebooting?