Error – display read failed with 'Window Access Failed'

[Benas Benediktas]

I keep getting Error – display read failed with ‘Window Access Failed’ error when trying to calibrate ASUS MB169B+ USB monitor with DisplayCAL. Calibration of main monitor works just fine. And calibration of Asus USB monitor with Spyder sowftware also “does smth” 😀

03:13:00,078 ——————————————————————————–
03:13:00,078 Calibrate & profile
03:13:00,108
03:13:00,138 ——————————————————————————–
03:13:00,138 Session log: MB169B+ #2 2016-12-31 03-12 D6500 2.2 F-S XYZLUT+MTX
03:13:00,138
03:13:00,138 Working directory:
03:13:00,138 c:\
03:13:00,138 users\
03:13:00,140 benedi~1.lip\
03:13:00,140 appdata\
03:13:00,140 local\
03:13:00,141 temp\
03:13:00,141 DisplayCAL-09wbzi\
03:13:00,141
03:13:00,141 Command line:
03:13:00,141 dispcal.exe
03:13:00,141 -v2
03:13:00,142 “-d2,1”
03:13:00,142 -c1
03:13:00,142 -yn
03:13:00,142 “-P0.497136311569,0.487562189055,1.48988764045”
03:13:00,144 -ql
03:13:00,144 -t6500
03:13:00,144 -g2.2
03:13:00,144 -f1.0
03:13:00,144 -k0
03:13:00,144 -A4.0
03:13:00,144 -b
03:13:00,145 “MB169B+ #2 2016-12-31 03-12 D6500 2.2 F-S XYZLUT+MTX”
03:13:00,147
03:13:00,542 DisplayCAL: Starting interaction with subprocess
03:13:00,546 Setting up the instrument
03:13:01,897 Instrument Type: Datacolor Spyder5
03:13:01,898 Serial Number: 50090487
03:13:01,898 Hardware version: 0x0a0f
03:13:01,967 Place instrument on test window.
03:13:01,967 DisplayCAL: Waiting for send buffer
03:13:03,470 DisplayCAL: Skipping place instrument on screen message…
03:13:03,476 DisplayCAL: Sending buffer: ‘ ‘
03:13:03,479 Hit Esc or Q to give up, any other key to continue:
03:13:03,480 Display type is ‘n’
03:13:03,480 Target white = 6500.000000 degrees kelvin Daylight spectrum
03:13:03,480 Target white brightness = native brightness
03:13:03,480 Target black brightness = native brightness
03:13:03,480 Black point device hack is enabled
03:13:03,484 Target advertised gamma = 2.200000
03:13:03,486
03:13:03,486 Display adjustment menu:
03:13:03,486 Press 1 .. 7
03:13:03,486 1) Black level (CRT: Offset/Brightness)
03:13:03,486 2) White point (Color temperature, R,G,B, Gain/Contrast)
03:13:03,486 3) White level (CRT: Gain/Contrast, LCD: Brightness/Backlight)
03:13:03,486 4) Black point (R,G,B, Offset/Brightness)
03:13:03,486 5) Check all
03:13:03,487 6) Measure and set ambient for viewing condition adjustment
03:13:03,487 7) Continue on to calibration
03:13:03,489 8) Exit
03:13:03,490 DisplayCAL: Waiting for send buffer
03:13:05,854 DisplayCAL: Sending buffer: ‘7’
03:13:05,858 Commencing display calibration
03:13:05,858 Patch 1 of 9The instrument can be removed from the screen.
03:13:05,878 dispcal: Error – display read failed with ‘Window Access Failed’
03:13:05,880
03:13:05,983 DisplayCAL: Reached EOF (OK)
03:13:05,986 …aborted.

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