Program frozen after prepare mission

To recreate the frozen state:

-you open a read-only mission into Mission Editor

-Change nothing

-Flight/Prepare mission

-Exit mission

-Frozen instead of opening mission editor

After the simulation the screen is black and the program is frozen:

2018-09-19 13:31:40.171 INFO TERRAIN: lSystem::CleanScenes()

2018-09-19 13:31:40.309 INFO EDCORE: (dDispatcher)enterToState_:3

2018-09-19 13:31:43.097 ERROR VFS: VFS_open_write: CreateFile(C:\Users\pitwalker\Saved Games\DCS.openbeta\Missions\onlyKamov1countryBLUE.miz): Unknown error

2018-09-19 13:31:43.097 ERROR Lua::Config: Call error onShowMainInterface:[string "./MissionEditor/modules/me_mission.lua"]:6250: can't open "C:\Users\pitwalker\Saved Games\DCS.openbeta\Missions\onlyKamov1countryBLUE.miz" for 'wb'

stack traceback:

[C]: ?

[C]: in function 'assert'

[string "./MissionEditor/modules/me_mission.lua"]:6250: in function 'copyMission'

[string "./MissionEditor/MissionEditor.lua"]:605: in function 'openReturnScreen'

[string "./MissionEditor/MissionEditor.lua"]:678: in function <[string "./MissionEditor/MissionEditor.lua"]:669>.

2.5.3.23788 still unable to handle well Read-only missions

2018-11-07 15:23:34.018 INFO TERRAIN: lSystem::CleanScenes()

2018-11-07 15:23:34.227 INFO EDCORE: (dDispatcher)enterToState_:3

2018-11-07 15:23:34.501 ERROR VFS: VFS_open_write: CreateFile(C:\Users\pitwalker\Saved Games\DCS.openbeta\Missions\moon_carriers_BRC270.miz): Unknown error

2018-11-07 15:23:34.501 ERROR Lua::Config: Call error onShowMainInterface:[string "./MissionEditor/modules/me_mission.lua"]:6236: can't open "C:\Users\pitwalker\Saved Games\DCS.openbeta\Missions\moon_carriers_BRC270.miz" for 'wb'

stack traceback:

[C]: ?

[C]: in function 'assert'

[string "./MissionEditor/modules/me_mission.lua"]:6236: in function 'copyMission'

[string "./MissionEditor/MissionEditor.lua"]:614: in function 'openReturnScreen'

[string "./MissionEditor/MissionEditor.lua"]:687: in function <[string "./MissionEditor/MissionEditor.lua"]:678>.

Just curious, but why is the mission read only? Are you running the game as admin?

Some of my missions are Read-Only for saving the state as is, from accidental overwriting.

I started read onlys since this at first occured with me: https://forums.eagle.ru/showthread.php?t=211723&highlight=save+failure

1: because an important milestone of a big mission

2: because is a rare bug reproduction state (that was a mission to worth to conserve: https://forums.eagle.ru/showpost.php?p=3632818&postcount=12 -->that precise bug fixed)

3: because of a track file that hard to replay again in the same way

(I simpy set RO flag in my file manager.)

2018-12-08 13:12:04.141 INFO    TERRAIN: lSystem::CleanScenes()
2018-12-08 13:12:04.421 INFO    EDCORE: (dDispatcher)enterToState_:3
2018-12-08 13:12:08.927 ERROR   VFS: VFS_open_write: CreateFile(C:\Users\pitwalker\Saved Games\DCS.openbeta\Missions\f14_all.miz): Unknown error
2018-12-08 13:12:08.927 ERROR   Lua::Config: Call error onShowMainInterface:[string "./MissionEditor/modules/me_mission.lua"]:6258: can't open "C:\Users\pitwalker\Saved Games\DCS.openbeta\Missions\f14_all.miz" for 'wb'
stack traceback:
[C]: ?
[C]: in function 'assert'
[string "./MissionEditor/modules/me_mission.lua"]:6258: in function 'copyMission'
[string "./MissionEditor/MissionEditor.lua"]:614: in function 'openReturnScreen'
[string "./MissionEditor/MissionEditor.lua"]:687: in function <[string "./MissionEditor/MissionEditor.lua"]:678>.

Black screen to program kill

2018-12-20 23:22:58.798 INFO    Config: netview stopped
2018-12-20 23:22:58.881 INFO    TERRAIN: lSystem::CleanScenes()
2018-12-20 23:22:59.069 INFO    EDCORE: (dDispatcher)enterToState_:3
2018-12-20 23:22:59.614 ERROR   VFS: VFS_open_write: CreateFile(C:\Users\pitwalker\Saved Games\DCS.openbeta\Missions\BLUE_vs_RED_v3.1.2.miz): Unknown error
2018-12-20 23:22:59.614 ERROR   Lua::Config: Call error onShowMainInterface:[string "./MissionEditor/modules/me_mission.lua"]:6295: can't open "C:\Users\pitwalker\Saved Games\DCS.openbeta\Missions\BLUE_vs_RED_v3.1.2.miz" for 'wb'
stack traceback:
[C]: ?
[C]: in function 'assert'
[string "./MissionEditor/modules/me_mission.lua"]:6295: in function 'copyMission'
[string "./MissionEditor/MissionEditor.lua"]:619: in function 'openReturnScreen'
[string "./MissionEditor/MissionEditor.lua"]:692: in function <[string "./MissionEditor/MissionEditor.lua"]:683>.