If you get that error message then all it means is that you do not have that particular type of mission file in your Quick folder eg in your screenshot you can't fly a strike mission on the Okinawa map so the file it is looking for in your Quick folder is OkinawaRedStrike00.mis or OkinawaBlueStrike00.mis
Okinawa is one of the default maps and I don't recall seeing any Okinawa missions in any of the QMB packs released so you are restricted to (for the Okinawa map) the default target types Airbase, Armor and None.
You could create your own strike mission and call it OkinawaBlueStrike00.mis or OkinawaRedStrike00.mis and drop it in your Quick folder and that should then enable the target type Strike for the Okinawa map.
Cheers
Quelty
ty for the help
and how do you create a strike mission
Any mission will load in the qmb+ as long as it has waypoints in it for Russion (none) and German (none) Squadron 1, flights 1 through 4. These flights only have to include one plane each, and can be any allied and axis aircraft. These will be populated by what you select within the qmb+ interface. The mission will then play out as it ws designed. It can include other flights beyond the 8 indicated above, but these will not be editable within the qmb+. The naming convention as posted earlier needs to be followed. -viking