A. Windows 10
B. 1080tis
C. 64GB
D. 25.21.14.1735
E. 3.07, 3.08, 4.0, 4.0 RC7, 4.0 XB1, 2018.1 RC1
F. 4.02.1-R3
G. C4D R20
H.
Hey Ahmet, this bug only occurs in R20 and has happened for several versions for me. When I open the texture manager to relink my textures, I get green check marks, but the textures don't update. Then when I reopen the texture manager window, they're back to being red Xs again. So my workaround is opening the scenes in R19, relinking, and then opening in R20. Let me know if you need any additional details, thanks!