# GUESS_VECTOR

> Guess vector type. Accepted values are `UNIT` for a unit vector guess NUM_ROOTS and NUM_INIT_VECS must both be 1); `H0_BLOCK` to use eigenvectors from the H0 BLOCK submatrix (default); `DFILE` to use NUM_ROOTS previously converged vectors in the D file; `IMPORT` to import a guess previously exported from a CI computation (possibly using a different CI space)

> - Type: string
> - Possible Values: UNIT, H0_BLOCK, DFILE, IMPORT
> - Default: H0_BLOCK