Thanks for the prompt replies guys. I've been trying to get it to happen so that I can try the Ctrl+space trick but needless to say I haven't been able to reproduce the problem, but I'm sure it will happen when I least expect it.
Can't say I've ever had this problem in FS9 Gary but I may just have been lucky.
Thanks again.
Zaphod.

What doesn't kill you makes you stronger. But why take the risk?
Windows 10
Intel i7 950 3.06Ghz (8mb Cache)
MSI X58 Pro-E MoBo
MSI GeForce GTX 1050ti oc
Corsair MXS