Here's the 2DTexture-errors I get with the SP maps I try to play with:

 

Create2DTexture( *lightmap1_secondary, 1024, 2048, 0, 21 ) failed: 8876017c = Out of video memory

-->Got this after making a Private Match on Cliffhanger. Somehow the RAM goes into Max and drops down to low usage when I close iw4m...

 

Create2DTexture( menu_background, 1280, 700, 0, 827611204 ) failed: 8876086c = Invalid call

-->This I sometimes get on the vey startup of the game. The error pops behind blackscreen (Alt+Tabbing)

Also I get this if I try to make Private Matches on Aiport:

1 Error comes when I do /devmap airport

2 Error comes too when I move cursor on the preview-img in the Private Match-menu.

Set your texture quality to 'automatic' or manually to 'low' this helps at least for the 'Out of memory'- error.

Already tried, not helping D:

(My texture quality was already low/auto before I made this topic)

Any other solutions? Actually I was hoping to get an answer to the second error.

Already tried, not helping D:

(My texture quality was already low/auto before I made this topic)

Any other solutions? Actually I was hoping to get an answer to the second error.

I guess you're using ATI/AMD, so first update your drivers. If it still doesn't work enable the "support DXT texture formats" option in your catalyst center. Seems to work for some people out there.