Yambo Community Forum

Posted: **Thu Oct 05, 2023 10:41 am**

Dear developers,
To inperpolate the GW bands, I used ypp -y of v-5.2.0 first to remove the symmetry, but it stops with the error:

[ERROR] STOP signal received while in[04] K-point grid
[ERROR] Error reading K-point grid, please run setup again!

However the v-5.1.1 is OK.
What it could be?

Best

Shudong

Posted: **Thu Oct 05, 2023 10:48 am**

The error usually means that you first need to run the setup, e.g. yambo without any input file.
After that you should be able to run ypp.

Best,
D.

Posted: **Thu Oct 05, 2023 10:51 am**

Dear Shudong,

this means that something happened when reading the ndb.kindx file. Is it present in your SAVE database?
Best,
Daniele

Posted: **Thu Oct 05, 2023 10:54 am**

Dear Daniele,
Yes, the ndb.kindx file is in the SAVE dir.! When I move to v-5.1.1 in the same directory, it works but 5.2.0 does not!
Best
Shudong

Posted: **Thu Oct 05, 2023 11:06 am**

If you have nbb.kindx generated with 5.1 it maybe not accepted by 5.2

Ypp for 5.2.0