errors: "Failed to create shader program: Vertex attribute mismatch" and "Failed to create Graphics Pipeline State"

[alkulang]

Errore one:

While working on modding my map I often start a new savegame and the shader file deleted. It seems to me that I randomly get this error. Starting vanilla or oder custom maps (including all my downloaded mods)  no errors occure. In many days of work tried to insulate the responsible transfergroup in the GE. No success. 

Staring the game with the existing shader and savegame, these errors disapeer. My questions:

Are these errors matter playing the game?

Is there a connetion with the error "Shader archive 'shared/shader_dx12_q3_sb1_s16_sf0_t3_ao1_bn0_r1_v1_sr0_v60_f60_sg.sharc' cannot be found." ?

Is there any adwise how t corret his errors ?

Errore two:

Sice a few weeks I'm getting this error as in error one only with my onwn map. Same quetion as above:

What are the implicaton on the game?  If sinnificant, how do I correct this errors? 

 

Since I have invested month of work on my map, and I spent many weeks on solving these errors, I would be very thankfull of your help.

log_new_savegame_and _shader.txt log_existing_savegame_and _shader.txt

[WrinkleysRule]

First off update your Nvidia drivers to the latest version released on the 18th December 2025

Second you say "I often start a new savegame and the shader file deleted. It seems to me that I randomly get this error"  

Does the error only appear after you start a new game AND have deleted the shader cache ?

[alkulang]

Thank you for helping me and Happy New Year.

- Nvidia update: done, same errors

- errors "failed to create shader program..."  and  "shader archive ... not found" : only appear after I deleted the shader file no matter whether I start with a new savegame or not

- errors "failed to create Graphics Pipeline..." : they always appear on any log

Log_new_shader_existing_savegame_01_01_26.txt Log_existing_shader and existing _savegame_01.01.26.lnk